The current heat wave and dry winds are intensifying the fires.
3600 square kilometres are burning in Oregon alone.
In California, several forest fires and bush fires combined to form a single 2000 square metre fire on Thursday.
12500 square kilometres have already burned in California this year. The current fires are among the 20 largest in California's history since records began around 1930.The sky over San Francisco is orange.
California's Governor Gavin Newsom sees climate change as the cause of the fires.