Active California wildfires, flagged when close to a major highway.

Data: the interagency WFIGS current-wildfire feed (NIFC) - name, size in
acres, percent contained, discovery date. Points are each fire's ORIGIN,
not its perimeter: a large fire can affect roads far from this point.
Refresh: 5-minute cache; size/containment typically update once or twice
a day. Small, fast-moving local fires may appear in CHP incident logs
(get_incidents, type "FIRE-Report of Fire") before this feed has them.

Filters:
- near_route (e.g. "I-5", "101") - only fires within ~10 miles of that
  highway's corridor line.
- center "lat,lon" with radius_km - fires around a place, regardless of
  highway.
Without either, every active CA fire is returned, each carrying a
`near_highways` list of major corridors within ~10 miles (empty = not
near a covered major highway; it may still affect local roads).

This tool does NOT know about road closures caused by fires - cross-check
get_incidents and get_lane_closures for the affected area.