Capt. Ben McLane said stalled onboarding of seasonal employees will force the system to operate at a diminished capacity as the wildfire season heats up.
Interstate 80 was closed in Green River after the crash and will likely remain so until at least Wednesday, officials said. The roadway runs from San Francisco nearly to New York City.
Fire debris and potentially toxic ash could make the water unsafe for surfers and swimmers, especially after rain that can transport chemicals, trash and other hazards into the sea.
Flood alerts in the Los Angeles area were lifted by Thursday evening. Evacuation orders and warnings are in place through 2 p.m. local time (5 p.m. ET) Friday in recently burned areas.
Thousands of people had been warned to evacuate areas in and around burn scars from the wildfires in the Los Angeles area. A mudslide covered Mulholland Drive.