The Chicago area was hit was the coldest temperatures its seen in two years Monday.

Chicago-area temperatures early this morning dropped into the upper single digits to lower teens, and when combined with northwest winds gusting to 25 miles per hour resulted in wind chills from zero to as low as -15 degrees.

At Hot Doug’s on the north side, sub zero wind chills didn’t freeze out the appetites of the briskly faithful, bundled up, waiting for a bite of what waited inside.

Emergency room doctors say if you need to go out, watch for signs of hypothermia, like confusion and frostbite, including tingling of the ears, nose and fingers.

Warming centers are open throughout the city, hoping to keep every person safe especially seniors and children.

Remember to check on neighbors to make sure they’re okay. If you need to help or know someone who does, call 311.

Even colder air is still on the way and the Chicago National Weather Service Office has issued a Wind Chill Advisory for tonight into Tuesday morning.

For more on the forecast log on to Chicago Weather Center