Here are updated maps using data from National Interagency Fire Center public GIS data site and IR from NIFC FTP site. NIFC GIS site is a great resource, check it out. https://data-nifc.opendata.arcgis.com/
The orange area is last night’s perimeter at 6pm. Dark red from this afternoon. Bright red/yellow from 5:20 pm.
Not much spread in past 24 hours on south or SE side of fire. Fire backed actively toward Bear Valley on east flank and toward Shasta Lake on north. A pretty good run happened this evening on north flank of Bear Mtn, and fire was hot along powerline corridor near I-5 at 5:20pm.