Riverside County valleys were included in a special weather statement issued by the National Weather Service due to high temperatures that are expected to exceed 100 degrees the remainder of this week.
Temperatures will remain between five and 15 degrees above normal through Saturday, according to the statement issued by the NWS of San Diego.
In Murrieta, the forecast calls for highs of 104 degrees Thursday and Friday, and 101 degrees on Saturday. Overnight lows will be in the 70s.
"Needless to say...summer is not over," NWS stated. "As these hot and muggy conditions continue to prevail across the Southland, those sensitive to the heat are encouraged to take precautions. Those planning outdoor activities should also be prepared for this heat...including drinking plenty of water and avoiding strenuous activities during the hottest part of the day."