Extreme Heat Warning

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 113 expected. Localized Major Heat Risk.

* WHERE...In Arizona, Central La Paz, Parker Valley, and Yuma. In California, Palo Verde Valley.

* WHEN...From 10 AM MST /10 AM PDT/ this morning to 8 PM MST /8 PM PDT/ Thursday.

* 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.