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 106 to 111 expected. Major Heat Risk. * WHERE...Portions of Imperial County, including the Imperial Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can c