Kay will still be about 220 miles south of San Diego on Friday, according to the National Weather Service in Los Angeles, but the flow around the storm will bring easterly winds to the area, which could bring extreme heat all the way down to the beaches .
The weather service in San Diego extended the excessive heat warning for the region through Friday to account for the possibility of high temperatures well into the 90s to 100 reaching the coast.
California faces ‘new normal’ as West sees new temperature records
The human-caused climate crisis is amplifying extreme weather in California, climate and weather experts told CNN, pushing temperatures to unprecedented levels this month.
And the ongoing heat wave may, in fact, be one of the worst on record for any month, not just September, UCLA climate scientist Daniel Swain said in a Twitter Spaces discussion Tuesday.
“This will be essentially the worst September heat wave on record, certainly in Northern California and arguably for the state overall,” Swain said. “By some metrics, it might be one of the worst heat waves on record, period, in any month, given its duration and its extreme magnitude, especially in Northern California and especially in the Sacramento region.”
Jan Null, a California meteorologist and owner of Golden Gate Weather Services, pointed to San Jose, which hit 109 degrees Tuesday, breaking an all-time high temperature record. Nine of the city’s top 10 hottest days have occurred in the 21st century, he said — a sign the climate crisis is stoking extreme heat. “And all the modeling is showing that we are going to see more frequent heat waves and longer heat waves,” Null said.
“In some ways,” he said, “this is the new normal.”
Greenhouse gas emissions from human activities have heated the planet by about 1.2 Celsius since preindustrial times and that warmer baseline means higher temperatures can be reached during extreme heat events, scientists say.
Numerous heat records have been set across the West, according to the weather service.
San Francisco airport hit 97 degrees Monday, breaking a daily record. Salinas hit 103 degrees, shattering the previous record of 92 degrees set in 2004. Livermore hit a record high of 116.
Salt Lake City hit 104 Monday, the hottest September day on record and also the 32nd day this year with temperatures reaching at least 100 degrees, beating the previous record by 11 days.
Temperatures in Billings, Montana, reached 100 degrees Monday, which tied a previous record. This was the first time Billings has hit 100 degrees twice in the same September.
Wildfires ignited throughout the West
The hot and dry conditions also mean that fires will spread more quickly, rage more intensely and burn for longer.
Several destructive wildfires erupted over the past week, with at least four people dying in two California blazes that also burned homes and thousands of acres of land.
The fires, burning simultaneously in parched drought-stricken lands, have choked the hot atmosphere with smoke, bringing unhealthy air quality to parts of the Western states.
The thick smoke, billowing from numerous wildfires, is visible from space, according to images released by the National Oceanic and Atmospheric Administration
The fires have also displaced thousands of residents as the flames advanced on communities, slashing through dry vegetation, and burning homes and cars.
CNN’s Taylor Romine contributed to this report.