Correct me, but looks like two different fires, cameras are not lining up and looks like @EPBL41 New Start is the correct BTU location. Different than Rainbow.
Start of Rainbow is east just under a mile as the crow flies from start of Rancho…
Mapped at 30 acres by FIRIS. Those extra 70 acres from IC’s report on condition must have been smoke acres… this area is certainly tinder dry and not a place we want any fire. Insane WUI and one way in and out. Evacuees were turning west onto Rancho Tehama “away” from the fire, only to get stuck with no through roads. Tehama Sheriff dispatcher was google map sat viewing a private unmaintained dirt road that would get them to the Stagecoach Road system and out, but fire behavior dissipated enough local deputies said to just shelter in place for now at the end of the road.