[Steely Tom]

It will light the surrounding atmosphere, the air will catch fire.

I'm not sure what you mean by "catch fire." Do you mean burn (oxidize), in the chemical sense?

[Kevmo]

Yes. The microparticles in the air will be the fuel, the oxygen and heat generating those 3 elements of fire. Since the temperature is 5 orders of magnitude greater than ordinary fires, I expect perhaps 3-4 orders of magnitude more damage.

That’s a lot of damage.