If you don't have to go outside I would advise people to stay inside if there is a dangerous wind chill.
When a wind chill advisory is expected that means that temperatures will get so low in the winter with the wind blowing and make the temperature feel around 25 below zero or even 45 below zero and in those temperatures frostbite can set in in just 30 minutes or less.
It's okay to step outside for a bit if you need too. Just bundle up but don't stay out for longer than 30 minutes at a time.
If you don't have to go outside then just try and find something to do inside the house instead.