After 20 minutes of driving, the vehicle caught fire under the hood and was completely destroyed. When I first started driving the car that morning, I noticed an odd smell coming from the heater. It didn't smell like smoke or burning; I best equate it to the smell of a hair dryer. This is the first time I'd ever smelled that odor in this car. At this point there were no warning messages or alerts on the dashboard that would indicate an issue. After driving for around 20 minutes, I noticed smoke coming from under the hood. There were still no warning lights on the dashboard. I immediately pulled over into an open parallel parking spot on the side of the road (busy city street) and shut the car off. While I was assisting the other 2 passengers out of the car, flames became visible coming from under the hood. The source of the flames appeared to be the top driver's side under the hood (in front of steering wheel). We called 911 and stepped back to a safe distance. The fire was extremely aggressive and the entire vehicle was engulfed in flames in just a couple minutes. The fire was so intense that it caught the car parked in front on fire (which also became completely destroyed). The fire department responded after roughly 5 minutes and put out the fire. Fortunately, no injuries resulted from this incident. There was so much damage to the vehicle that the fire investigator was not able to offer a definitive opinion as to which specific engine/battery component li