Residents of the northeastern United States are bracing for the coldest wind chill in decades as a winter storm moves into the region.

The National Weather Service has issued wind chill advisories for the region, with temperatures expected to drop to as low as -25 degrees Fahrenheit in some areas. The coldest temperature is expected to arrive Wednesday night, with a wind chill of -35 degrees Fahrenheit in some locations.

The wind chill is a measure of how cold it feels when the wind is taken into account. It is calculated by combining the temperature and wind speed.

The cold weather is expected to last through the weekend, with temperatures remaining below freezing in some areas.

The cold temperatures could be dangerous for those who are outdoors for extended periods of time. The National Weather Service is urging people to dress in layers and cover exposed skin to protect against frostbite.

Officials are also warning people to be aware of the dangers of carbon monoxide poisoning from running cars in enclosed spaces.

The cold weather is expected to break by the start of next week, with temperatures in the 40s forecasted for Monday and Tuesday.