The word explosion is in the headline. No government agency or anyone who was at the scene is quoted using that word. (Edit: not in the linked article at time of writing, FBI Buffalo Field Office has used that term in statements) I question whether there even was an explosion.
Cars are fueled by a flammable liquid. The gas can catch fire, and cars do catch fire from time to time. Cars don’t have pressurized fuel tanks, so will burn rather than explode.
However, there is enough fuel for a car fire to be large enough that a layperson might mistake it for an explosion.
This could be an accident. It could be a terrorist attack. But we can be sure that for-profit news companies have an incentive to use whatever language sounds most scary. If it bleeds it leads, as the saying goes.