Arizona, California Severe Extreme Heat Warning | Effective 07/23/2026 15:56

Headline: 
Extreme Heat Warning issued July 23 at 3:56PM MST until July 27 at 8:00PM MST by NWS Phoenix AZ
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
July 23, 2026 - 3:56pm
Expires: 
July 24, 2026 - 4:00am
Description: 
* WHAT...Dangerously hot conditions. Afternoon temperatures 105 to 119 degrees. Major to Extreme Heat Risk. * WHERE...Portions of southwest Arizona and southeast California. * WHEN...Until 8 PM MST /8 PM PDT/ Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.
Instruction: 
An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. 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. 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. Public cooling shelters are available in some areas. Consult county officials for more details.
Area Description: 
Parker Valley; Kofa; Yuma; Central La Paz; Southeast Yuma County; Gila River Valley; Joshua Tree NP West; Joshua Tree NP East; Imperial County Southwest; Salton Sea; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley; Chiriaco Summit; Palo Verde Valley; Chuckwalla Valley
Forcast Office: 
NWS Phoenix AZ