* WHAT...Dangerously hot conditions with highs 110 to 120 degrees across the Mojave Desert. Highs 100 to 110 degrees across most of the southern Great Basin and Arizona Strip. Little to no overnight relief is expected, particularly in the Mojave Desert where lows of 80 to 95 degrees are forecast. This will result in major to extreme heat risk.
* WHERE...Portions of northwest Arizona, southeast California, and south central and southern Nevada.
* WHEN...From 10 AM PDT /10 AM MST/ Thursday to 8 PM PDT /8 PM MST/ Sunday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.