Firefighters also dropped fire retardant from a plane, the NTSB said.
California firefighters needed to spray 50,000 gallons of water to extinguish a roadside Tesla Semi fire, the US National Transportation Safety Board (NTSB) announced in a preliminary report. Crews also used an aircraft to drop fire retardent in the “immediate area as a precautionary measure,” according to the agency.
The crash happened at 3:13 AM on August 19 on the I80 freeway east of Sacramento. The tractor-trailer departed the roadway while navigating a curve, struck a traffic delineator and eventually hit a tree. The driver was uninjured but taken to hospital as a precaution.
The Tesla Semi’s large 900kWh battery caught fire and reached a temperature of 1,000 degrees F while spewing toxic fumes. It continued to burn into the late afternoon as firefighters dowsed it with water to cool it down (Tesla sent a technical expert to assess high-voltage hazards and fire safety). It wasn’t until 7:20 PM (over 16 hours after the crash) that the freeway was reopened.