Tesla Semi Fire: NTSB Preliminary Report Released

The National Transportation Safety Board (NTSB) released a preliminary report stating that a Tesla Semi electric truck in California required firefighters to use “50,000 gallons” (approximately 190,000 liters) of water to extinguish a roadside fire. Firefighting teams also deployed an aircraft to drop fire retardant on nearby areas as a precautionary measure to control the fire.

The accident occurred on August 19 at 3:13 AM local time on the I-80 highway east of Sacramento. The electric truck went off the road while navigating a curve, collided with a roadside boundary marker, and then struck a tree, coming to a stop. Fortunately, the driver was not injured in the accident; however, considering their health condition, they were taken to the hospital.

The Tesla Semi’s large 900 kWh battery caught fire upon impact, and toxic smoke began to spread during the fire. While the fire continued with temperatures reaching up to 538°C, firefighters worked intensively to cool the blaze with water. However, due to the fire’s effects, the vehicle continued to burn until late in the afternoon. Meanwhile, Tesla sent a technical expert to the scene regarding fire safety and high voltage hazards.

The highway reopened to traffic at 7:20 PM local time, 16 hours after the accident. The NTSB, as an organization that can only make recommendations and cannot enforce regulations, sent a team to the area for investigation purposes. This major accident raised several issues, including dangerously hot fires and toxic smoke, which will attract the attention of many international organizations.

The NTSB had previously stated in 2021 that fires in the batteries of electric vehicles pose serious risks to emergency response teams and that the guidelines provided by manufacturers for such fires are inadequate.