The haze you see in the sky from the Canadian wildfires is to blame for a second straight air quality alert in Door and Kewaunee counties. The Wisconsin Department of Natural Resources issued the warning Thursday afternoon for most of the state, effective from 3 p.m. until 11 p.m. on Friday. The air quality is unhealthy for sensitive groups, so people with asthma or heart disease should take the proper precautions. Everybody else is encouraged to keep outdoor activities shorter and less intense and to go inside if they have symptoms.