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Home Return to list Heat Advisory 0001 Issued by the Flagstaff Forecast Office
Action: Time Extended Issued At: 2026-08-01 00:35:14 681 WWUS75 KFGZ 010534 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 1034 PM MST Fri Jul 31 2026 AZZ005-038-011900- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Marble and Glen Canyons-Oak Creek and Sycamore Canyons- Including the cities of Sedona, Page, Lees Ferry, and Village of Oak Creek 1034 PM MST Fri Jul 31 2026 /1134 PM MDT Fri Jul 31 2026/ ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST /9 PM MDT/ MONDAY... * WHAT...Dangerously hot conditions, with temperatures around 105 to 110 degrees expected. * WHERE...Marble Canyon, Glen Canyon, and Oak Creek Canyon; including Page and Sedona. * WHEN...Until 8 PM MST /9 PM MDT/ Monday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ006-011900- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260805T0300Z/ Grand Canyon Country- Including the cities of Supai, Grand Canyon North Rim, Tusayan, and Grand Canyon Village 1034 PM MST Fri Jul 31 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST TUESDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 103 to 108 degrees at Havasupai Gardens, and 111 to 115 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Tuesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. && $$ AZZ018-037-011900- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Northern Gila County-Yavapai County Valleys and Basins- Including the cities of Young, Payson, Bagdad, Cottonwood, Camp Verde, Cordes Junction, and Strawberry 1034 PM MST Fri Jul 31 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST MONDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions, with temperatures around 108 to 115 degrees expected below 4000 feet. * WHERE...Northern Gila and Yavapai counties below 4000 feet; including the Verde Valley and Black Canyon City. * WHEN...Until 8 PM MST Monday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ009-010-012>014-040-011900- /O.EXT.KFGZ.HT.Y.0001.260801T1700Z-260804T0300Z/ Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley- Little Colorado River Valley in Coconino County-Little Colorado River Valley in Navajo County-Little Colorado River Valley in Apache County-Northeast Plateaus and Mesas South of Hwy 264- Including the cities of Holbrook, Springerville, Kaibito, Chinle, St. Johns, Keams Canyon, Kayenta, Canyon De Chelly, Winslow, Dilkon, Wupatki National Monument, Chambers, Snowflake, Kykotsmovi, and Tuba City 1034 PM MST Fri Jul 31 2026 /1134 PM MDT Fri Jul 31 2026/ ...HEAT ADVISORY NOW IN EFFECT FROM 10 AM MST /11 AM MDT/ SATURDAY TO 8 PM MST /9 PM MDT/ MONDAY... * WHAT...Temperatures of 100 to 106 degrees expected. * WHERE...Little Colorado River Valley and the lower elevations of Navajo Nation in Arizona. * WHEN...From 10 AM MST /11 AM MDT/ Saturday to 8 PM MST /9 PM MDT/ Monday. * IMPACTS...Pets, livestock, and those sensitive to heat, such as the homeless, elderly, and children will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Humphreys Action: Continued Issued At: 2026-08-01 13:28:19 847 WWUS75 KFGZ 011827 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 1127 AM MST Sat Aug 1 2026 AZZ005-038-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Marble and Glen Canyons-Oak Creek and Sycamore Canyons- Including the cities of Page, Village of Oak Creek, Lees Ferry, and Sedona 1127 AM MST Sat Aug 1 2026 /1227 PM MDT Sat Aug 1 2026/ ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST /9 PM MDT/ MONDAY... * WHAT...Dangerously hot conditions, with temperatures around 105 to 110 degrees expected. * WHERE...Marble Canyon, Glen Canyon, and Oak Creek Canyon; including Page and Sedona. * WHEN...Until 8 PM MST /9 PM MDT/ Monday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ006-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260805T0300Z/ Grand Canyon Country- Including the cities of Grand Canyon North Rim, Supai, Tusayan, and Grand Canyon Village 1127 AM MST Sat Aug 1 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST TUESDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 103 to 108 degrees at Havasupai Gardens, and 111 to 115 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Tuesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. && $$ AZZ018-037-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Northern Gila County-Yavapai County Valleys and Basins- Including the cities of Camp Verde, Young, Cordes Junction, Cottonwood, Strawberry, Payson, and Bagdad 1127 AM MST Sat Aug 1 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST MONDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions, with temperatures around 108 to 115 degrees expected below 4000 feet. * WHERE...Northern Gila and Yavapai counties below 4000 feet; including the Verde Valley and Black Canyon City. * WHEN...Until 8 PM MST Monday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ009-010-012>014-040-040300- /O.CON.KFGZ.HT.Y.0001.000000T0000Z-260804T0300Z/ Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley- Little Colorado River Valley in Coconino County-Little Colorado River Valley in Navajo County-Little Colorado River Valley in Apache County-Northeast Plateaus and Mesas South of Hwy 264- Including the cities of Tuba City, Holbrook, Springerville, Keams Canyon, Chinle, Chambers, Snowflake, Kykotsmovi, Canyon De Chelly, Winslow, St. Johns, Wupatki National Monument, Dilkon, Kayenta, and Kaibito 1127 AM MST Sat Aug 1 2026 /1227 PM MDT Sat Aug 1 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /9 PM MDT/ MONDAY... * WHAT...Temperatures of 100 to 106 degrees expected. * WHERE...Little Colorado River Valley and the lower elevations of Navajo Nation in Arizona; including the Kaibito Plateau, Painted Desert, and Chinle Valley. * WHEN...Until 8 PM MST /9 PM MDT/ Monday. * IMPACTS...Pets, livestock, and those sensitive to heat, such as the homeless, elderly, and children will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Meola Action: Continued Issued At: 2026-08-03 00:12:07 497 WWUS75 KFGZ 030511 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 1011 PM MST Sun Aug 2 2026 AZZ005-040300- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260805T0300Z/ Marble and Glen Canyons- Including the cities of Lees Ferry and Page 1011 PM MST Sun Aug 2 2026 /1111 PM MDT Sun Aug 2 2026/ ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST /9 PM MDT/ TUESDAY... * WHAT...Dangerously hot conditions, with temperatures around 105 to 110 degrees expected. * WHERE...Marble and Glen Canyons. * WHEN...Until 8 PM MST /9 PM MDT/ Tuesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ006-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260805T0300Z/ Grand Canyon Country- Including the cities of Grand Canyon Village, Tusayan, Grand Canyon North Rim, and Supai 1011 PM MST Sun Aug 2 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST TUESDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 102 to 107 degrees at Havasupai Gardens, and 110 to 114 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Tuesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. && $$ AZZ018-037-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Northern Gila County-Yavapai County Valleys and Basins- Including the cities of Bagdad, Cordes Junction, Cottonwood, Camp Verde, Young, Strawberry, and Payson 1011 PM MST Sun Aug 2 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST MONDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions, with temperatures around 107 to 113 degrees expected below 4000 feet. * WHERE...Northern Gila and Yavapai counties below 4000 feet; including the Verde Valley and Black Canyon City. * WHEN...Until 8 PM MST Monday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ038-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Oak Creek and Sycamore Canyons- Including the cities of Village of Oak Creek and Sedona 1011 PM MST Sun Aug 2 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST MONDAY... * WHAT...Dangerously hot conditions, with temperatures around 103 to 108 degrees expected. * WHERE...Oak Creek and Sycamore Canyons. * WHEN...Until 8 PM MST Monday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ009-010-012>014-040-040300- /O.CON.KFGZ.HT.Y.0001.000000T0000Z-260804T0300Z/ Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley- Little Colorado River Valley in Coconino County-Little Colorado River Valley in Navajo County-Little Colorado River Valley in Apache County-Northeast Plateaus and Mesas South of Hwy 264- Including the cities of Keams Canyon, St. Johns, Holbrook, Chinle, Kayenta, Chambers, Wupatki National Monument, Snowflake, Canyon De Chelly, Tuba City, Kykotsmovi, Dilkon, Winslow, Kaibito, and Springerville 1011 PM MST Sun Aug 2 2026 /1111 PM MDT Sun Aug 2 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /9 PM MDT/ MONDAY... * WHAT...Temperatures up to 105 degrees expected. * WHERE...Little Colorado River Valley and the lower elevations of Navajo Nation in Arizona; including the Kaibito Plateau, Painted Desert, and Chinle Valley. * WHEN...Until 8 PM MST /9 PM MDT/ Monday. * IMPACTS...Pets, livestock, and those sensitive to heat, such as the homeless, elderly, and children will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Zanker Action: Time Extended Issued At: 2026-08-03 12:39:48 180 WWUS75 KFGZ 031739 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 1039 AM MST Mon Aug 3 2026 AZZ005-040315- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260806T0300Z/ Marble and Glen Canyons- Including the cities of Lees Ferry and Page 1039 AM MST Mon Aug 3 2026 /1139 AM MDT Mon Aug 3 2026/ ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST /9 PM MDT/ WEDNESDAY... * WHAT...Dangerously hot conditions, with temperatures around 105 to 110 degrees expected. * WHERE...Marble and Glen Canyons; including Page. * WHEN...Until 8 PM MST /9 PM MDT/ Wednesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ006-040315- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260806T0300Z/ Grand Canyon Country- Including the cities of Supai, Tusayan, Grand Canyon North Rim, and Grand Canyon Village 1039 AM MST Mon Aug 3 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST WEDNESDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 102 to 107 degrees at Havasupai Gardens, and 110 to 114 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Wednesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. && $$ AZZ018-037-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Northern Gila County-Yavapai County Valleys and Basins- Including the cities of Camp Verde, Payson, Cordes Junction, Young, Strawberry, Bagdad, and Cottonwood 1039 AM MST Mon Aug 3 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING BELOW 4000 FEET... * WHAT...Dangerously hot conditions, with temperatures around 105 to 112 degrees expected below 4000 feet. * WHERE...Northern Gila and Yavapai counties below 4000 feet; including the Verde Valley and Black Canyon City. * WHEN...Until 8 PM MST this evening. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ038-040300- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Oak Creek and Sycamore Canyons- Including the cities of Village of Oak Creek and Sedona 1039 AM MST Mon Aug 3 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING... * WHAT...Dangerously hot conditions, with temperatures around 103 to 108 degrees expected. * WHERE...Oak Creek and Sycamore Canyons; including Sedona. * WHEN...Until 8 PM MST this evening. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ009-010-012>014-040-040315- /O.EXT.KFGZ.HT.Y.0001.000000T0000Z-260805T0300Z/ Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley- Little Colorado River Valley in Coconino County-Little Colorado River Valley in Navajo County-Little Colorado River Valley in Apache County-Northeast Plateaus and Mesas South of Hwy 264- Including the cities of Kayenta, Springerville, Kykotsmovi, Holbrook, Wupatki National Monument, St. Johns, Keams Canyon, Chambers, Kaibito, Winslow, Tuba City, Canyon De Chelly, Dilkon, Chinle, and Snowflake 1039 AM MST Mon Aug 3 2026 /1139 AM MDT Mon Aug 3 2026/ ...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM MST /9 PM MDT/ TUESDAY... * WHAT...Temperatures of 100 to 105 degrees expected. * WHERE...Little Colorado River Valley and the lower elevations of Navajo Nation in Arizona; including the Kaibito Plateau, Painted Desert, and Chinle Valley. * WHEN...Until 8 PM MST /9 PM MDT/ Tuesday. * IMPACTS...Pets, livestock, and those sensitive to heat, such as the homeless, elderly, and children will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Meola Action: Continued Issued At: 2026-08-03 22:02:05 703 WWUS75 KFGZ 040301 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 801 PM MST Mon Aug 3 2026 AZZ018-037-038-040415- /O.EXP.KFGZ.XH.W.0007.000000T0000Z-260804T0300Z/ Northern Gila County-Yavapai County Valleys and Basins-Oak Creek and Sycamore Canyons- Including the cities of Young, Strawberry, Sedona, Payson, Village of Oak Creek, Camp Verde, Bagdad, Cordes Junction, and Cottonwood 801 PM MST Mon Aug 3 2026 ...EXTREME HEAT WARNING HAS EXPIRED... Temperatures have dropped below warning criteria. Therefore, the Extreme Heat Warning will be allowed to expire. Temperatures will remain between 100 and 108 degrees on Tuesday, so make sure to drink plenty of water and exercise caution if outside during the daytime. $$ AZZ005-042100- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260806T0300Z/ Marble and Glen Canyons- Including the cities of Lees Ferry and Page 801 PM MST Mon Aug 3 2026 /901 PM MDT Mon Aug 3 2026/ ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST /9 PM MDT/ WEDNESDAY... * WHAT...Dangerously hot conditions, with temperatures around 105 to 110 degrees expected. * WHERE...Marble and Glen Canyons; including Page. * WHEN...Until 8 PM MST /9 PM MDT/ Wednesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ006-042100- /O.CON.KFGZ.XH.W.0007.000000T0000Z-260806T0300Z/ Grand Canyon Country- Including the cities of Supai, Tusayan, Grand Canyon Village, and Grand Canyon North Rim 801 PM MST Mon Aug 3 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST WEDNESDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 102 to 107 degrees at Havasupai Gardens, and 110 to 114 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Wednesday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. && $$ AZZ009-010-012>014-040-042100- /O.CON.KFGZ.HT.Y.0001.000000T0000Z-260805T0300Z/ Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley- Little Colorado River Valley in Coconino County-Little Colorado River Valley in Navajo County-Little Colorado River Valley in Apache County-Northeast Plateaus and Mesas South of Hwy 264- Including the cities of Canyon De Chelly, St. Johns, Holbrook, Chambers, Winslow, Keams Canyon, Kykotsmovi, Snowflake, Kaibito, Chinle, Springerville, Wupatki National Monument, Kayenta, Tuba City, and Dilkon 801 PM MST Mon Aug 3 2026 /901 PM MDT Mon Aug 3 2026/ ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /9 PM MDT/ TUESDAY... * WHAT...Temperatures of 100 to 105 degrees expected. * WHERE...Little Colorado River Valley and the lower elevations of Navajo Nation in Arizona; including the Kaibito Plateau, Painted Desert, and Chinle Valley. * WHEN...Until 8 PM MST /9 PM MDT/ Tuesday. * IMPACTS...Pets, livestock, and those sensitive to heat, such as the homeless, elderly, and children will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Zanker Action: Expired Issued At: 2026-08-04 22:28:33 195 WWUS75 KFGZ 050328 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 828 PM MST Tue Aug 4 2026 AZZ009-010-012>014-040-050430- /O.EXP.KFGZ.HT.Y.0001.000000T0000Z-260805T0300Z/ Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley- Little Colorado River Valley in Coconino County-Little Colorado River Valley in Navajo County-Little Colorado River Valley in Apache County-Northeast Plateaus and Mesas South of Hwy 264- Including the cities of Canyon De Chelly, Winslow, Holbrook, St. Johns, Kykotsmovi, Chinle, Wupatki National Monument, Springerville, Chambers, Tuba City, Snowflake, Keams Canyon, Kayenta, Kaibito, and Dilkon 828 PM MST Tue Aug 4 2026 /928 PM MDT Tue Aug 4 2026/ ...HEAT ADVISORY HAS EXPIRED... The threat has ended. Temperatures will fall below Advisory Criteria over the next few days. For this reason the Heat Advisory has been ended. However, hot temperatures will continue so make sure and exercise precaution when heading out into the days heat. $$ AZZ005-051130- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260808T0300Z/ Marble and Glen Canyons- Including the cities of Page and Lees Ferry 828 PM MST Tue Aug 4 2026 /928 PM MDT Tue Aug 4 2026/ ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST /9 PM MDT/ FRIDAY... * WHAT...Dangerously hot conditions, with temperatures up to 107. * WHERE...Marble and Glen Canyons. * WHEN...Until 8 PM MST /9 PM MDT/ Friday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Stay cool, stay hydrated, stay informed. && $$ AZZ006-051130- /O.EXT.KFGZ.XH.W.0007.000000T0000Z-260808T0300Z/ Grand Canyon Country- Including the cities of Supai, Grand Canyon Village, Grand Canyon North Rim, and Tusayan 828 PM MST Tue Aug 4 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST FRIDAY BELOW 4000 FEET... * WHAT...Dangerously hot conditions below 4000 feet, with daytime temperatures ranging from 95 degrees at Havasupai Gardens, to 112 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...Until 8 PM MST Friday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. && $$ McCollum | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||