It is believed that the driver lost control of the car and crashed into a guardrail causing the electric Tesla to burst into flames, trapping the four people inside.

One person survived the horrific crash after being saved by a Canada Post employee who smashed a window in the Tesla to retrieve the 25-year-old woman.

It is understood that the woman had been trying to open the door but the Tesla doors would not open.

Rick Harper, the Post employee, shared with Toronto Star”  “You couldn’t open the doors. I would assume the young lady would have tried to open the door from the inside, because she was pretty desperate to get out.”

“I don’t know if that was the battery or what. But she couldn’t get out,”

He explained that he didn’t know there were others in the vehicle as there was so much smoke, he couldn’t see them.

Deputy Fire Chief Jim Jessop said: “Certainly the intensity of the fire is directly linked to the battery cells in the Tesla.”

This horrific incident comes after Tesla claimed to be the safest car in the world.

A safety report issued by the company read: “Model S, Model 3, Model X and Model Y have achieved among the lowest overall probability of injury of any vehicles ever tested by the U.S. government’s New Car Assessment Program.

“Much of this has to do with the rigid, fortified structure of the battery pack that is mounted to the car’s floor, which provides a vehicle with exceptional strength, large crumple zones, and a uniquely low center of gravity. Because of their strength, Tesla’s battery packs rarely incur serious damage in accidents.

“And, in the extremely unlikely event that a fire occurs, the state-of-the-art design of our battery packs ensures that its safety system works as intended and isolates a fire to select areas within the battery while simultaneously venting heat away from the passenger cabin and the vehicle.”