# HEADLINE
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EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST MONDAY
# DETAILS
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WHAT
Dangerously hot conditions with temperatures 101 to 106 in Santa Cruz and Cochise Counties and 107 to 113 elsewhere. Major to Extreme HeatRisk is expected.
WHERE
Eastern Cochise County below 5000 feet, South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley, Upper Santa Cruz River Valley/Altar Valley, and Western Pima County.
WHEN
Until 8 PM MST Monday.
IMPACTS
Heat related illnesses increase significantly during extreme heat events.
ADDITIONAL DETAILS
Warm overnight low temperatures of 84 to 90 degrees in the deserts will provide little to no relief from heat overnight. Warmest overnight low temperatures expected in the Western Deserts.
ISSUED AT
Friday, July 31, 2026 at 11:35 AM MST
ISSUED BY
National Weather Service Tucson AZ
HEADER
URGENT - WEATHER MESSAGE
# PRECAUTIONARY/PREPAREDNESS ACTIONS
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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.
# AREAS AFFECTED
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Southeast Pinal County, Eastern Cochise County below 5000 feet, South Central Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley, Upper Santa Cruz River Valley/Altar Valley, Western Pima County
Including the cities of Picacho Peak State Park, Sierra Vista, Benson, Tucson, Mammoth, Nogales, Willcox, Vail, Oracle, Douglas, Ajo, Green Valley, Clifton, Safford, Sells, Marana, and Organ Pipe Cactus N.M.