406 WWUS75 KTWC 221748 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 1048 AM MST Wed Jul 22 2026 AZZ501-502-504>506-509-231230- /O.NEW.KTWC.XH.W.0004.260724T1700Z-260726T0300Z/ Western Pima County-Tohono O'odham Nation-Tucson Metro Area-South Central Pinal County-Southeast Pinal County-Upper Gila River Valley- Including the cities of Oracle, Clifton, Safford, Green Valley, Organ Pipe Cactus N.M., Ajo, Tucson, Vail, Mammoth, Sells, Picacho Peak State Park, and Marana 1048 AM MST Wed Jul 22 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM FRIDAY TO 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions with temperatures of 105 to 112 degrees expected with Major HeatRisk. * WHERE...Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, and Western Pima County. * WHEN...From 10 AM Friday to 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Warm overnight low temperatures of 82-88 degrees will provide little to no relief from heat overnight. Warmest overnight low temperatures expected in the Western Deserts. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible and drink plenty of water. && $$ AZZ503-507-508-231230- /O.NEW.KTWC.XH.W.0004.260724T1700Z-260726T0300Z/ Upper Santa Cruz River Valley/Altar Valley-Upper San Pedro River Valley-Eastern Cochise County below 5000 feet- Including the cities of Benson, Douglas, Willcox, Nogales, and Sierra Vista 1048 AM MST Wed Jul 22 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM FRIDAY TO 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions with temperatures of 100 to 105 expected with Major HeatRisk. * WHERE...Eastern Cochise County below 5000 feet, Upper San Pedro River Valley, and Upper Santa Cruz River Valley/Altar Valley. * WHEN...From 10 AM Friday to 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible and drink plenty of water. && $$ JT