SAN DIEGO (KGTV) -- A heat advisory went into effect Saturday morning for a large swath of San Diego County as temperatures are expected to soar this weekend.
According to the National Weather Service, the advisory started at 10 a.m. and lasts through 8 p.m. Sunday. The agency says temperatures in the San Diego County mountains are expected to reach up to 100 degrees.
Further east, an excessive heat warning also went into effect at 10 a.m. Saturday through 8 p.m. Monday for the San Diego County deserts. Forecasters say temperatures there could reach 114 to 118 degrees in the deserts.
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By 1 p.m. Saturday, Ramona reached 101 degrees, passing a previous record of 100 set in 1983, according to the National Weather Service. At the same time, Escondido had reached 98 degrees and El Cajon had hit 99 degrees.
“Extreme heat will significantly increase the potential for heat-related illnesses, particularly for those working or participating in outdoor activities,” the NWS said.
Meanwhile, temperatures along the coast are set to reach into the low to mid-80s both Saturday and Sunday.
A slight cooling trend is expected to finally work its way across the region on Tuesday and continue through Thursday.