Where's the fire?
The sky is hazy and the sun is orange. This traces the air over your head backwards through the wind and tells you which fire most likely put the smoke there.
No account, no tracking. Your location is used for this lookup and not stored.
Traces, not guesses
Runs a back-trajectory through winds at three heights — smoke that reaches you from 600 miles away rarely travels at ground level.
Checks itself
Cross-references NOAA's hand-traced satellite smoke plumes and modeled PM2.5 before naming a fire.
Tells you when it does not know
Sometimes the haze is dust, or the source is out of range. It says so instead of inventing a fire.