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From Sacramento FD, 15 December 2017: Sacramento Engine 316 as part of California OES Strike Team 4805c, preparing to depart Ventura Base Camp for a day on the fire line. The Thomas Fire is now 252,500 acres, with 35% containment and 8,369 personnel assigned.

Hundreds of units are visible in their photo from the Ventura County Fairgrounds. Other totals as of 15 December: 1,012 fire engines, 62 water tenders, 32 helicopters, 158 handcrews, 78 bulldozers, plus other firefighting aircraft.

In the MODIS natural colour image below, smoke from California wildfires stretches north past the Oregon border. The southern half of Vancouver Island is visible at the top and the lower edge of this image is about 175 miles south of the Baja California border. Acquired by NASA’s Aqua satellite on 11 December 2017.

Aqua’s Atmospheric Infrared Sounder (AIRS) shows CO concentration on 11 December 2017. “Column” refers to the 5km-high column of air that’s measured and 10¹⁸ is one quintillion.

Further details on these Aqua images here.