With dangerously cold weather heading to the Naperville area, city and school officials are on alert and taking precautions to make sure residents stay safe.
Extreme cold warning issued
The National Weather Service has issued an extreme cold warning starting at 3 a.m. Friday and lasting until noon that day.
Wind chills of down to 35 degrees below zero are possible. Weather officials warn that under those conditions, frostbite can develop within 10 minutes.
Those who are heading outside should wear multiple layers and protective clothing like a hat, face mask, and gloves…