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Several area schools have canceled classes or are starting late on Tuesday because of dangerously cold wind chills.

• Albert Lea Area Schools, e-learning

• Alden-Conger School, e-learning

• Glenville-Emmons School, closed

• Lake Mills Community School, starting two hours late

• United South Central, starting two hours late

All of Minnesota is under an extreme cold warning until noon Tuesday.

According to the National Weather Service, wind chills could dip to as cold as 37 degrees below zero. The agency warns the most dangerous wind chills could come between 8 p.m. Monday and 9 a.m. Tuesday, when frostbite can occur on exposed skin in as little as 10 minutes.

People are urged to stay indoors until conditions improve. If you must go outdoors, you should dress in layers.

People should cover exposed skin to reduce the risk of frostbite or hypothermia, and keep pets indoors as much as possible.