SAN DIEGO (CNS) - A strong ridge of high pressure will cause a heat wave in San Diego County from Friday to Tuesday, likely setting new record high temperatures in the mountains and deserts.
According to the National Weather Service, the hottest days will be this weekend.
An excessive heat warning for the mountains and deserts is scheduled from 10 a.m. Friday to 8 p.m. Sunday. The weather service said highs over the weekend will range from 115 to 120 degrees in the deserts, 100 to 105 in the mountain foothills and 90 to 100 in mountain areas around 3,000 to 5,000 feet.
"Exceedingly high temperatures can cause heat-related illness or death," an NWS advisory said. "Those working or playing outdoors, and those without air conditioning are most vulnerable."
To avoid heat-related illness or death, residents are encouraged to wear light-weight, loose-fitting clothing and if possible, reschedule any planned strenuous outdoor activities to early morning or evening hours.
For those planning to escape the heat Friday by going to the beach, the weather service said swimmers must beware of strong rip currents -- the result of a long-period southerly swell.
"Above normal surf and the high risk of dangerous rip currents will diminish late Friday," according to the NWS, which said 3-to 5-foot surf with occasional sets to 6 feet was likely.