* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 109 expected. Major Heat Risk.
* WHERE...The Yuma area.
* WHEN...From 10 AM Tuesday to 8 PM MST 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.