National Weather Service officials said the freezing drizzle and icy conditions in the Chicago area are expected to end as temperatures rise to the low 40s Thursday. Patchy fog was in portions of Chicago and the surrounding areas but also was expected to end before 9 a.

Some Chicago area schools have announced delays and closures after overnight freezing rain left icy roadways Thursday morning. Local departments deployed salt trucks overnight. Sidewalks and intersections remain a concern as layers of ice lead to slick and dangerous conditions.

ComEd said it does not anticipate any power outages early on Wednesday night, but some could pop up overnight or in the morning. Marissa Sulek reports from Woodridge.