* WHAT...Dangerously hot conditions with temperatures up to 115 to 118 degrees expected through Death Valley and the lower Colorado River Valley, with highs between 107 to 110 degrees elsewhere. Near record warm low temperatures expected in urban areas.
* WHERE...Lake Mohave, Lake Mead, Lower Colorado River Valley / Lake Havasu, Northwest Deserts, Death Valley National Park, and Las Vegas Valley.
* WHEN...Until 8 PM PDT /8 PM MST/ Sunday.
* IMPACTS...Heat-related illnesses increase significantly during extreme heat events.