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It is projected to burn Southern California this week, which so far raises health and fire concerns across the region as this is projected to be the most important period of the hot heat this year.
Temperatures within Southern California will climb dramatically over the next few days, creating atmospheric instability that will promote extreme fire behavior and growth, with few opportunities for overnight relief.
Weather officials and experts are warning residents to plan for air conditioning access, emergency warnings and ways to get evacuated, if necessary.
What to expect
This heat wave poses a double threat to Southland. Prediction of triple digit fever is expected to pose an acute health risk, especially for vulnerable populations, and ignitions raise the threat of rapidly growing wildfires.
Many of the area are receiving extreme heat warnings until the weekend, but red flag warnings have been issued in Los Angeles and the Ventura County Mountains and hills.
When will the heat come? How long will it last?
Wednesday: Almost all of the region’s extreme heat warnings begin on Wednesday, with predictors beginning to rise in temperatures. Much of southwest California is under extreme heat watches warning of “dangerously hot conditions.”
Starting Wednesday, warnings have been issued for the mountains and hills of Los Angeles and Ventura County indicating ripe conditions for explosive fire growth.
Thursday and Friday: Temperatures are expected to peak on Thursday and Friday. On Thursday and Friday, it is expected that the inland area from the coast, including downtown Los Angeles, will be under extreme heatwatches. In these regions, highs are expected to reach 95-105 degrees. LA Valley can reach up to 110 people. Authorities warn that temperatures will also remain high for the night.
Also, much of the inland Orange County, the Inland Empire, the San Diego County Valley and the Southern San Joaquin Valley will expand under extreme heat watches starting Thursday. You can expect Orange County to see up to 95 degrees, San Diego County valleys up to 102, with the Inland Empire and Central Valleys up to 106 degrees.
Friday to Sunday: Authorities say there are also thunderstorm opportunities from Friday to the weekend. The strongest chances of these monsoon storms, about 20%, are in the mountains of LA and San Bernardino County. They can bring localized floods and lightning strikes, which can cause new fires.
Saturday and Sunday: Many heat and fire weather warnings are set to expire by the weekend, but officials say they can be extended. And even if the most extreme warnings expire, authorities warn that temperatures will remain high.
Early next week: forecasts are still uncertain, but the slight cooldown appears to begin next week, but temperatures will be above average during this time of year.
What is the risk of a fire?
A Red Flag warning was issued in the mountains and hills of Los Angeles and Ventura County, valid from 9am Wednesday until Saturday night.
Fire weather watches are available in the mountains and hills of Santa Barbara and San Luis Obispo County, one step below the warning of danger flags.
“The strong unseasonable instability will create a fire environment where explosive fire behavior can be generated through significant vertical plume growth,” Alert said. These conditions are particularly difficult when combined with dry landscapes with low relative humidity and low nighttime cooling.
While massive winds are not predicted, the alert says in the afternoon that there are local breezes that could exacerbate the spread of plume-controlled fires and add to a potentially dangerous fire climate environment.
The chances of thunderstorms on Friday, Saturday and Sunday will only increase the dangerous situation as there is a possibility of lightning fire.
Where is the worst heat?
Southeastern California, which includes the Mojave Desert and Yucca Valley, has received extreme heat warnings, with the Weather Service warning for the majority of its large numbers of heat risks. Temperatures are expected to reach 110 in Twentin’s palm, 115 in Burstow and 120 in Death Valley. This most extreme heat extends to northwestern Arizona and southern Nevada. Apple and Lucerne Valleys are expected to be able to see temperatures up to 108 degrees on Thursday, Friday and Saturday. Some of the hottest regions in LA County, including Santa Clarita, Palmdale and Woodland Hills, are expected to reach 105-108 on Thursday and Friday. PasoRobles could reach 107 on Thursday.
How do officials prepare?
Los Angeles officials are preparing for the heat wave by adding four cooling centers with air conditioning and water to the public’s network of libraries and parks.
Starting Wednesday, the city will open Canoga Park and North Hollywood Senior Centres from 10am to 9pm. On Thursday and Friday, the city will also open the Pecan Recreation Centre and the Algin Sutton Recreation Centre as cooling centres.
A map of the Cooling Center in Los Angeles can be found here.
The city’s fire department said it plans to pre-produce resources throughout the city, adding a new crew of 26 full-time firefighters focused on wildfires.
Tips for staying safe in extreme heat:
Avoid the outdoors and stay away from the sun, especially in the heat of the day. Choose external activities in the morning or evening when the temperature is low. Hydration. Lightweight and relaxed clothing. Know the signs and symptoms of fever-related illnesses and seek immediate help if necessary. Check in with your neighbors and the most vulnerable people, including children, elderly people, people living on the streets, pregnant people, people with chronic health conditions.
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