Southern California is about to experience its hottest stretch of the summer so far. The NWS Los Angeles is warning of dangerous triple-digit heat, humid conditions, and even the possibility of afternoon thunderstorms through the middle of the week.
Temperatures will continue climbing each day before peaking on Wednesday, when several inland communities could reach 110°F. Meanwhile, coastal cities won’t be spared either, with some beaches expected to see temperatures rise well into the 90s.
Triple-Digit heat is on the way
A Heat Advisory remains in effect through Tuesday morning for many inland areas before transitioning into an Extreme Heat Watch from Tuesday through Thursday evening as conditions become even more dangerous.
The hottest weather is expected across the San Fernando Valley, Inland Empire, Antelope Valley, and other inland communities, where afternoon highs could easily top 100°F. Overnight temperatures will stay unusually warm, and there will be little relief even after sunset.
Monsoonal moisture could bring thunderstorms
Along with the heat, Southern California will see an increase in monsoonal moisture, making the air feel noticeably more humid than usual for July.
That moisture also raises the chance of afternoon and evening thunderstorms, especially across the mountains and desert regions. While storms are expected to remain isolated, they could produce lightning, gusty winds, brief heavy rain, and localized flooding.
Wednesday looks like the hottest day
Current forecasts show Wednesday as the peak of this heat event, with many valleys forecast to reach between 105°F and 110°F.
The strong high-pressure system responsible for the heat is expected to slowly weaken later in the week, allowing temperatures to cool closer to seasonal averages by Friday.
How to stay safe during the heatwave
With dangerous heat expected across much of Southern California, it’s best to take precautions if you’ll be spending time outdoors.
- Stay hydrated throughout the day.
- Schedule outdoor activities during the early morning whenever possible.
- Wear lightweight, light-colored clothing and use sunscreen.
- Spend time in air-conditioned buildings if you don’t have cooling at home.
- Never leave children or pets inside parked vehicles.
- Keep an eye on family members, neighbors, and anyone who may be more vulnerable to extreme heat.
If you’re planning a hike or trip into the mountains or deserts, be prepared for rapidly changing weather conditions as thunderstorms can develop quickly during the afternoon.
Whether you’re heading to the beach or staying closer to home, this week’s forecast is a reminder that Southern California’s summer heat can become dangerous fast. Taking a few simple precautions can help you stay safe until temperatures begin easing later this week.
