Environment & Climate · World & National · North America

Extreme Heat Warning issued September 11 at 12:03PM MST until September 11 at 8:00PM MST by NWS Phoenix AZ

* WHAT...Dangerously hot and humid conditions. Afternoon temperatures 102 to 109 expected. Major Heat Risk. * WHERE...In Arizona, Central La Paz and Parker Valley. In California, Chuckwalla Valley and Palo Verde Valley. Also the Lower Colorado River Valley. * WHEN...Until 8 PM MST /8 PM PDT/ this evening. * IMPACTS...H