Lose Power Steering problems of the 2005 Ford Explorer

I was driving on 77 north in fancy gap, va, when suddenly I lost power steering and acceleration. I noticed smoke coming from car and in fact the car in front of me said he noticed black smoke and flames underneath the car. I pulled over to the shoulder and the car was immediately in flames. I exited through driver side door. My passenger had to exit through driver door as well because flames were spreading across the passenger side of the car. We distanced ourselves from the vehicle as the entire thing became engulfed in flames. Carroll county fire department and va state police arrived. It took over 45 minutes for the fire to be extinguished; the car kept re-igniting, even after several applications of water and anti-flame chemicals. The entire vehicle melted, including tires. Nothing was salvageable. The vehicle was a 2005 Ford Explorer with only 47,000 miles. It was meticulously maintained and recently serviced.