Scorching Heat Wave Continues Saturday with 100-Plus Highs for Much of San Diego

Much of San Diego County will experience 100-plus highs as the scorching Western heat wave continues for a fifth day on Saturday, the National Weather Service advised.

An excessive heat warning for all of the county remains in effect until 8 p.m. on Tuesday.

“Strong high pressure centered over the Great Basin will continue the heat wave into next week with very hot days and warm nights, except at the highest elevations in the mountains,” the weather service said. “The hottest days for coastal areas are expected over the weekend.”

Highs on Saturday are forecast to be around 90 near the coast, 100 inland, 106 in the inland valleys, the upper 90s in the mountains and around 109 in the deserts.

Despite the heat, there has been no call for a Flex Alert on Saturday after three days of requests to conserve power.

At the beaches, a pair of south swells will bring elevated surf and a high risk of rip currents through the holiday weekend.

In the back country, the fire risk was expected to grow over the weekend, with the weather service noting that relative humidity will drop to 15% to 25% each day.

“There is potential for large vertical plume growth with any new fires that develop, especially in the foothills and mountains,” the weather service said.