Riverside County mountains and valleys will remain under an excessive heat warning through Sunday evening, with temperatures potentially reaching 105 degrees at elevations below 5,000 feet in the mountains and up to 108 in the valleys.
The National Weather Service’s Sunday forecast calls for highs of up to 115 degrees in the Coachella Valley, up to 104 degrees in the Riverside County valleys and the Inland Empire and up to 100 degrees in the Riverside County mountains.
The advisory expires at 8 p.m. Sunday.
“Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities,” NWS forecasters warned. “Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible and drink plenty of water.”
Lightning strikes were reported in the Riverside County deserts Sunday morning.
“[10 AM Radar]: Showers and isolated t-storms continue to move northwestward this morning. Lightning strikes have been reported in the deserts in San Diego County and Riverside County in the past few hours, so please use caution and remember if thunder roars, go indoors,” the National Weather Service’s San Diego office tweeted.
Forecasters said the sweltering conditions will likely linger through next weekend as well.