Extreme Heat Warning
Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Tucson AZ
1228 PM MST Thu Jul 30 2026
AZZ501>509-311200-
/O.CON.KTWC.XH.W.0005.000000T0000Z-260803T0300Z/
Western Pima County-Tohono O`odham Nation-Upper Santa Cruz River
Valley/Altar Valley-Tucson Metro Area-South Central Pinal County-
Southeast Pinal County-Upper San Pedro River Valley-Eastern
Cochise County below 5000 feet-Upper Gila River Valley-
Including the cities of Safford, Green Valley, Willcox, Tucson,
Douglas, Mammoth, Benson, Ajo, Nogales, Clifton, Marana, Vail,
Sierra Vista, Picacho Peak State Park, Organ Pipe Cactus N.M.,
Oracle, and Sells
1228 PM MST Thu Jul 30 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SUNDAY...
* 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 Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Warm overnight low temperatures of 84 to 90
degrees will provide little to no relief from heat overnight.
Warmest overnight low temperatures expected in the Western Deserts.
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
