Dense fog in the Chicago area could reduce visibility to less than a quarter mile, and an advisory is in effect until Wednesday morning.
The dense fog advisory for Cook and Lake counties lasts until 11 a.m. Wednesday, according to the National Weather Service.
Visibilities could be even lower near Lake Michigan, and dense fog may develop farther inland Tuesday evening.
Travel could be hazardous, and drivers should slow down, use headlights and leave plenty of distance around them.
The rest of Tuesday will see lows in the lower 50s and a 20 percent chance of showers and thunderstorms until early Wednesday, forecasters said. Wednesday will bring highs in the 70s.