Temperatures are expected to soar well into the triple digits Monday in the San Diego County deserts before cooling off slightly through next weekend.
An excessive heat warning for desert areas is in effect until 8 p.m. Monday, with the mercury is expected to reach 116 degrees, according to the National Weather Service office in San Diego.
But it will be cooler along the coast, with early morning fog. Highs Monday will be 72 to 77 at the beaches, 82 to 87 inland, 85 to 90 in the western valleys and 93 to 98 near the foothills.
Weather service officials urged desert residents to drink plenty of fluids and check up on elderly relatives and neighbors, especially those without air conditioning.
The high-pressure system is expected to weaken on Tuesday, dropping high temperatures by about two degrees throughout the county.
“For Tuesday through the end of the week, a trough of low pressure moving slowly inland through the western states will spread cooling inland and deepen the marine layer,” the weather service said.
