The National Weather Service office in San Diego said Saturday it continues to expect a heat wave from Monday through Thursday that will bring triple-digit highs to the inland valleys.
“A prolonged period of very hot days combined with very warm nights is expected to create a dangerous situation in which heat illnesses are likely,” the weather service said.
An excessive heat warning will be in effect Monday through Thursday for the valleys, mountains and deserts of the San Diego region.
High temperatures on Tuesday and Wednesday will be in the 90s in the western valleys and 100 to 106 in the inland valleys.
Along the coast a shallow marine layer will offer some relief, the weather service said, but even in those areas temperatures will be above average, with highs in the mid 80s.
The heat wave will coincide with the arrival of one of the highest southwest swells of the year, with surf peaking at 4 to 8 feet Tuesday and Wednesday in northern San Diego County.
The high surf will create dangerous rip currents along local beaches.