* WHAT...Dangerously hot and humid conditions. Afternoon temperatures 98 to 115. Major Heat Risk.
* WHERE...Chuckwalla Mountains, Chocolate Mountains, Chiriaco Summit, and Joshua Tree NP.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death.