The Pacific Northwest is in the midst of a record-breaking wildfire season, with more than one million acres already burned before the region's climatological peak of fire season in August. MORE FLASH FLOOD EMERGENCIES ISSUED AS 'PARTICULARLY DANGEROUS SITUATION' UNFOLDS IN SOUTHWESTERN COLORADOMany of the Pacific Northwest's largest wildfires share a common origin: lightning . Dangerous fire weather ranging from hot temperatures, dry vegetation, low humidity and gusty winds allowed the lightning-sparked fires to spread rapidly across the region. WILDFIRE SMOKE FROM THE NORTHWEST SWEEPS ACROSS THE US TO MID-ATLANTIC AND SOUTHEASTAir Quality Alerts. Nation's largest wildfire surpasses 300K acres, burns across Oregon and IdahoThe nation's largest wildfire has exploded to more than 300,000 acres, spreading from southwestern Oregon into Idaho less than a week after it ignited on July 23.