Firefighters were digging lines amid good weather conditions to begin corralling the first major wildfires of the season. As of Thursday afternoon, about 56,000 acres had burned. But evacuation notifications had been downgraded for those living closest to the fire lines south and east of Wenatchee. Wildfire smoke that invaded the Spokane area on Wednesday dispersed Thursday morning when the wind shifted. Calmer conditions were reported in the vicinity of the fires on Thursday following strong wind gusts that drove the flames on Wednesday. Fire officials said the three fire starts on Monday were triggered by lightning.