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Weather officials are warning residents in burn scar areas and other vulnerable communities to take precautions ahead of time and be prepared if conditions become dangerous.
The department said it has faced more than $50 million in federal, state and local funding cuts.
California Attorney General Rob Bonta said the focus of this investigation is to find out if the response violated state anti-discrimination and disability rights laws.
CBS LA has also issued a Next Traffic Alert to warn drivers about the impact on their commute.
Mayor Bass said she was signing the directive to "protect Los Angeles" from the federal government.
The rain is expected to start around 4 p.m. on Tuesday and will continue through Wednesday evening before conditions dry out.
The company said hospitals and nearly all medical offices will remain open through these dual strikes, but some appointments may be shifted to virtual.
Aerial footage of Herbert Hoover High School and Van Nuys City Hall showed crowds of students marching in the street holding signs and flags.
Firefighters were unable to immediately turn off the water because the car had struck high-voltage wires, which caused a significant hazard.
A Los Angeles Fire Department spokesperson said the crash at a 99 Ranch Market in Westwood is currently being investigated as an accident.
Two people were arrested for battery on a police officer and four people were arrested for felony vandalism.
CBS LA has issued a Next Traffic Alert to warn drivers about the impact on their morning commutes.
SkyCal flew over the protest where hundreds of students could be seen holding signs and flags as they marched towards City Hall.
Fire crews quickly began working to extricate the man and transported him to a local trauma center.
The NWS said temperatures in some areas, including Burbank, LAX and Long Beach, could possibly break records.