* WHAT...Dangerously hot conditions. Afternoon temperatures 109 to 119 expected. Major to Extreme Heat Risk.
* WHERE...Mostly rural portions of southwest Arizona and southeast California, including Joshua Tree National Park.
* WHEN...Until 8 PM MST /8 PM PDT/ Monday.
* IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death.