COLUMBUS, Ohio (AP) --Schools are closing, driving is restricted and emergency agencies are urging Ohioans to heed safety warnings amid another deep freeze.

The National Weather Service put most of Ohio under a wind chill warning Monday as temperatures dropped and forecasters predicted wind chills well below zero into Tuesday. They warned of wind gusts reaching 35 to 45 mph, with blizzard conditions in some rural areas.

The Ohio Turnpike banned certain large vehicles and trailers from the toll road Monday morning because of high wind.

Paulding and Williams counties in northwest Ohio were under snow emergencies closing roads to everyone except emergency workers. Dozens more counties had lower-level snow emergencies for hazardous roads, asking people to avoid driving if possible.

Many schools across central Ohio started one or two hours late.  Others that had delayed the start of classes then decided to close.

Related story: Central Ohio counties under Snow Emergencies