Bob Ferguson declared a statewide emergency over wildfire activity. Ferguson released a statement, calling on all WA residents to be extremely careful with any outdoor activities that could trigger a fire. DNR says the last time this many acres burned was in 2021, and we are not out of fire season yet. When Was the Worst Season in State History? The worst wildfire season in WA State history was in 2015, when just over 1 million acres burned, the equivalent of 1,562 square miles.