Dontcha mean 'hot' ?
Just a local search of the last couple years finds the following (and many more). The first is actually 10 years old but included because it's almost the exact same situation (2 fires in a week causing all buses removed from service). Guess we should ban gas vehicles, clearly they are dangerous.
Not to worry. Electrics are perfect. Nothing to see here… Move along,… Move along. These are not the droids you’re looking for.