- Being burned by fire.
- If the wind picks up and the flames spread, the whole town could go on fire.
- (idiomatic) Achieving good results at a rapid rate.
- That striker has scored four goals so far - he's on fire!
- (being burned by fire): afire, aflame, alight, burning, flaming, going up in smoke, in flames
- (rapidly achieving good results): on a roll, on a tear
being burned by fire
rapidly achieving good results