San Diego County is bracing for intensely hot weather this week, with temperatures expected to soar to dangerously high levels by Wednesday, July 9 and Thursday, July 10, according to forecasts released late Tuesday evening.
Heat advisories in effect for valleys, mountains and deserts
The rising temperatures that began on Tuesday are just the beginning. Meteorologists anticipate extreme heat conditions mid-week, especially in the inland valleys, mountains, and desert regions. A heat advisory is in effect for the valleys and mountain areas, while an excessive heat warning is active for the deserts, where temperatures could break seasonal records.
NBC 7 Meteorologist Sheena Parveen explained that the hot spell is driven by a high-pressure system positioned just east of Southern California. “That ridge is strengthening, and that’s why Wednesday and Thursday are expected to be the hottest days,” said Parveen.
Temperatures to reach triple digits inland
Forecast models suggest inland valley and mountain areas may climb into the upper 90s °F (35–37°C), while the deserts are expected to scorch into the mid-110s °F (43–46°C). These extreme highs could challenge or break previous heat records, especially across Anza-Borrego Desert State Park, Ocotillo Wells, and other eastern zones.
Cooling centers open across San Diego County
As the heat intensifies, residents are being encouraged to stay hydrated, limit outdoor exposure during peak hours, and seek shelter in designated Cool Zones across San Diego County. These zones include local libraries, community centers, and other publicly accessible spaces designed to offer relief during high-temperature events.
The heat surge is expected to ease by Friday, when the high-pressure system will begin to weaken. By the weekend, temperatures should return to levels typical for mid-July in Southern California, said Parveen.
Stay updated with your First Alert 7 extended 10-day forecast for detailed projections on how this heat wave may evolve across San Diego County.
