Car Will Not Start problems of the 2013 Hyundai Santa Fe

Driving conditions were clear weather and dry roads with heavy traffic. While traveling approximately 65 mph westbound on interstate 4, the vehicle lost all power and all the warning indicator lights came on. Fortunately, was able to coast across traffic to the emergency lane. Tried to restart the car and all the indicator lights came on but the car didn't start. Exited the vehicle and walked towards the front to see smoke, at first, then saw flames coming from under the engine compartment. Tried to dial 911, but had weak cell signal. Apparently 911 was notified. Highway patrol arrived, the flames were spreading and getting larger. By the time the fire department arrived, the vehicle was totally engulfed in flames, which reached almost 10 feet high. The fire fighters were able to contain the fire before it reached the fuel tank, but the vehicle and its contents were totally burned. The vehicle was a shell of metal and ash when it was towed away.

Car wouldn't start. Everything went dead. Had car towed from NY city to dealer in NJ. They checked everything and found nothing wrong. This occurred on sept 27, 2015. It happened again on Dec. 27, 2015. Several people tried to jump start it to no avail. Tow truck arrived and was going to tow it from NY state to NJ dealer. Tried to jump it again and it took a jump. Took it to a mechanic on Dec 28, 2015 and they found battery was good and checked electrical and found no problem. My concern is it happens while driving and I lose power and have no brakes or steering or stop lights and I could be killed or someone else could be injured. Both times the vehicle was in a parking space on a city street or parking lot in a mall. Cause unknown. I have no records of the tow from NY city but it was towed by Hyundai so they have a record.