Where lightning has hit, where fires are burning, and how dry the land is.

Is the data fresh?

Top right: a green dot means up to date (new data every 10 minutes). An amber dot and a banner mean the data is late, so recent lightning may be missing.

Lightning

Each glow is a strike seen by satellite. Color is time since it struck: bright white-blue is the last hour, fading to purple over 3 days. Size is the size of the flash, not the fire risk. New strikes flash as they arrive. Positions are accurate to within a few miles.

Fires

Flame badges are wildfires reported by fire agencies. Tap one for its name, size and containment.

Gold ring, labelled NEW: reported in the last 24 hours. The ones to watch.

Orange ring: still burning; the label shows how much is contained.

Small and grey: 100% contained or declared out.

Small dots: a satellite saw unusual heat. White-hot means seen in the last few hours, fading to dark red over 3 days. Often a fire, sometimes a controlled burn or industry. Fresh heat near recent lightning is worth watching.

Fuel dryness (turn on under Layers)

Green is wet, orange is very dry. Lightning on dry ground is far more likely to start a fire.

The panel

Choose how far back to show lightning (1 hour to 3 days), switch layers, and check each data source. Tap anything on the map for details. 3D tilts the map to show the terrain.

Not an official warning. Call 911 in an emergency. For evacuations, follow your county and local fire agencies.