![Firefighters try to control a back burn as the Carr fire continues to spread towards the towns of Douglas City and Lewiston near Redding, California on July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)](http://www.ecns.cn/hd/2018/08/02/d25c3b4886e9440094c6fec794757993.jpg)
Firefighters try to control a back burn as the Carr fire continues to spread towards the towns of Douglas City and Lewiston near Redding, California on July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)
![Firefighters try to control a back burn as the Carr fire continues to spread towards the towns of Douglas City and Lewiston near Redding, California on July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)](http://www.ecns.cn/hd/2018/08/02/0d763f0f222e41a0a5eb475d0dc81bf0.jpg)
Firefighters try to control a back burn as the Carr fire continues to spread towards the towns of Douglas City and Lewiston near Redding, California on July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)
![A firefighter lights backfires while battling the Ranch Fire (Mendocino Complex) north of Upper Lake, California, U.S. August 1, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)](http://www.ecns.cn/hd/2018/08/02/0181393ed12a46879f66fbffd89cc6aa.jpg)
A firefighter lights backfires while battling the Ranch Fire (Mendocino Complex) north of Upper Lake, California, U.S. August 1, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)
![A firefighter lights backfires while battling the Ranch Fire (Mendocino Complex) north of Upper Lake, California, U.S. August 1, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)](http://www.ecns.cn/hd/2018/08/02/eb23c199b7844749b1d340313d157ef4.jpg)
A firefighter lights backfires while battling the Ranch Fire (Mendocino Complex) north of Upper Lake, California, U.S. August 1, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)
![An aircraft drops fire retardant to slow the spread of the Carr Fire, west of Redding, California, U.S. July 27, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)](http://www.ecns.cn/hd/2018/08/02/5cced0a8f7074b919659cd90930b4f30.jpg)
An aircraft drops fire retardant to slow the spread of the Carr Fire, west of Redding, California, U.S. July 27, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)
![A structure burns out of control in the River Fire (Mendocino Complex) in Lakeport, California, U.S. July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)](http://www.ecns.cn/hd/2018/08/02/dc7b3923326b41b5ae9221e4a297367e.jpg)
A structure burns out of control in the River Fire (Mendocino Complex) in Lakeport, California, U.S. July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)
![A structure burns out of control in the River Fire (Mendocino Complex) in Lakeport, California, U.S. July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)](http://www.ecns.cn/hd/2018/08/02/a5188c30ddf84ef480588f42c5f7bcf5.jpg)
A structure burns out of control in the River Fire (Mendocino Complex) in Lakeport, California, U.S. July 31, 2018. A 70-year-old woman and her two great-grandchildren were among six people killed when a wildfire engulfed entire communities in northern California, officials and family members said. (Photo/Agencies)