Flames cover 942,247 acres in the Pacific Northwest on average . The three large fires are the most the region has seen at one time , an unofficial estimate . CNN 's Dave Alsup and Janet DiGiacomo contributed to this report . Weather officials in Washington and Idaho warning smoke creates unhealthy air .
Flames cover 942,247 acres in the Pacific Northwest on average . The three large fires are the most the region has seen at one time , an unofficial estimate . Weather officials in Washington and Idaho warning smoke creates unhealthy air .