Can a camera flash start a fire?

So i started using the on-camera flash on my nikon d3300 and noticed if i shoot with it really fast the flash gets super hot, and burns. Is it possible to start a fire with the heat of a flash

Probably not. There may be a thermistor in the flash circuit that won't let it work if it gets over a certain temperature. Or the flash may be designed such that it will cool down enough in the time it takes to charge. I melted a flash unit once, a cheap external flash, but it still wasn't hot enough to start a fire.

It's technically feasible to burn yourself if you put your finger over the tube, so I suppose you COULD set fire to a piece of paper, if you fired the flash often enough.

You're in far more danger from looking into a firing flash tube, than you are from starting a fire with one, so you should be fine as long as you don't let your flashgun fall into the hands of an idiot.

I doubt it. It might get hot enough to melt the plastic lens but not enough to cause fire.

If you were careless enough to try and use the flash in a combustable atmosphere, yes it would spark a fire or explosion, but NOT because the flash tube got hot. It is the spark that initiates the flash what would be hot enough to cause a combustible atmosphere to explode

You would burn out your flash…