San Diego is starting Wednesday with scattered to broken clouds between 10,000 and 20,000 feet, but the comfortable morning will not last. Temperatures are expected to climb into the mid-80s to lower 90s near beaches by afternoon, while the Inland Empire reaches 104 to 110 degrees. An Extreme Heat Warning covers coastal and valley communities through 8 p.m.
The warning comes with unusually warm overnight conditions, with Wednesday night dipping only to around 75. According to the National Weather Service, residents should drink plenty of fluids, stay out of the afternoon sun and check on neighbors who may be especially vulnerable to heat.
Heat Advisory Takes Over Wednesday Night
A Heat Advisory begins at 8 p.m. Wednesday and remains in effect through 8 p.m. Thursday. Thursday will still be warm, with cooling continuing into Friday as the heat gradually backs off.
Evening High Tide Could Flood Coastal Low Spots
Along the shoreline, a Coastal Flood Advisory remains in effect until 11 p.m. Wednesday. Evening high tides are expected to peak near 7 feet, which could flood low-lying parks, lots and roads and cause isolated closures.
People heading to the beach should avoid driving through standing water or around barricades, particularly during the evening tide. The latest alert updates Tuesday's Hoodline report, which covered the start of the region's heat and surf troubles.
Cooler, Foggier Mornings Arrive Friday
The marine layer is expected to return in coastal areas, with coastal highs easing into the 70s over the weekend and into next week. Coastal-area overnight temperatures are expected to be in the 60s by Sunday and Monday.
Isolated showers or thunderstorms could develop over the mountains and inland valleys Wednesday afternoon, with a smaller chance Thursday. For coastal residents, the main Wednesday planning challenge is straightforward: limit time outdoors during the hottest part of the day, then keep an eye on the tide after sunset.
