Extreme Heat Alert Issued for Southern California: What to Expect
Heat Watch Announced
The National Weather Service (NWS) in San Diego has declared an extreme heat watch starting Monday at 10 AM and lasting until Friday at 8 PM. This alert affects the Santa Ana Mountains and Foothills, with temperatures potentially soaring to 93 degrees. The NWS cautions that the upcoming week's temperatures could be 20 to 30 degrees higher than the seasonal average. They emphasized that the early timing and prolonged duration of this heat wave could heighten the risk of heat-related illnesses, particularly among vulnerable groups and those lacking air conditioning.
Weekend Weather Overview
This Weekend First
Before the heat wave fully sets in, temperatures will fluctuate. Following a record high of nearly 90 degrees in downtown Los Angeles on Friday, the weekend will see a slight dip, with temperatures dropping to the mid-80s on Saturday and Sunday due to some marine air moving inland. The 98th Academy Awards in Hollywood on Sunday evening are expected to remain dry, with temperatures gradually decreasing from the 80s into the 70s overnight. Enjoy this brief respite, as it will be short-lived.
Forecast for Next Week
What's Coming Next Week
Beginning Monday, temperatures are predicted to rise significantly, exhibiting what meteorologists describe as summer-like intensity across the area, reaching levels typically seen in May or June. Downtown Los Angeles is expected to approach record highs from Monday through Thursday, with some records dating back to 1914. Further inland, the heat intensifies, with desert regions in Southern California, Nevada, and Arizona likely exceeding 100 degrees. Las Vegas is forecasted to reach at least 100 degrees on Thursday, marking the earliest occurrence of such temperatures before May 1st.
Phoenix, which recorded its earliest 100-degree day on March 26, 1988, is also anticipating several days at or above that mark, with highs projected near 102 on Wednesday and 106 on Thursday—temperatures typical for mid-June. Death Valley is expected to hit 108 degrees on Wednesday, potentially breaking records for the earliest 100-degree and 105-degree temperatures, previously set on April 1, 1966.
Understanding the Heat Dome
The Heat Dome Driving It All
The phenomenon behind this heat wave is a persistent high-pressure system, commonly referred to as a heat dome, which is expected to strengthen in the coming days and may linger, explaining the extended forecast for the week.
Safety Tips During Heat Wave
How to Stay Safe
The NWS has provided several recommendations to stay safe during this heat event: Consistently hydrate, not just when thirsty; seek air-conditioned environments during peak heat hours; avoid direct sunlight when possible; and check on elderly neighbors and relatives. Never leave children or pets in parked cars, as interiors can heat up dangerously fast. If outdoor activities are necessary, schedule them for early morning or evening. Be aware of the signs of heat exhaustion and heat stroke, and wear lightweight, loose-fitting clothing. If someone exhibits symptoms of heat illness, move them to a cool, shaded area immediately and call 911 in emergencies.