* WHAT...Dangerously hot conditions. Afternoon temperatures 111 to 116 expected. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.
* WHERE...In Arizona, Parker Valley. In California, Chuckwalla Valley, Imperial County Southwest, Imperial County West, Imperial Valley, and Palo Verde Valley.
* WHEN...Until 8 PM MST /8 PM PDT/ Friday.
* 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.