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Code Blue Declared: Shelters Open Amid Cold Snap

12/4/2025

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Counties Activate Cold Shelters

Essex County, New Jersey declares a Code Blue due to dangerously low temperatures, effective December 1 through December 9, activating warming stations for homeless residents at night.
In South Mississippi, shelters will open December 2 as temperatures drop to the low 30s, providing overnight options.
Oklahoma braces for cold weather with possible light snow and freezing drizzle, especially in northern areas, as temperatures stay in the 30s.

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Sudbury Issues Cold Alert

Sudbury, Canada, issued the first Extreme Cold Weather Alert of the winter season for the next 24 hours.
The alert anticipates temperatures dropping to -18 degrees Celsius, with wind chills reaching -27 overnight.
The City of Greater Sudbury funds the initiative that activates emergency plans to enhance community services.
People on the streets and those at risk at home are encouraged to access available shelters and services.

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Polar Vortex Freeze

A polar vortex disruption is driving dangerously low temperatures across New England, with Boston forecast to reach lows in the teens and possibly below zero Thursday into Friday.
The cold snap will be brief but intense, with wind chills in the negative range.
After a slight warming over the weekend, more cold spells are expected throughout December.
Ongoing climate changes may contribute to this unusual pattern.

History

Historical Context

The January–March 2014 cold wave resulted from a weakened polar vortex, causing Arctic air to plunge southward across North America. This extreme weather event affected over 200 million people, leading to record-low temperatures and significant disruptions. The incident underscored concerns about climate change's role in increasing the frequency of severe winter weather, prompting cities to enhance emergency preparedness for vulnerable populations.

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Counties Activate Cold Shelters

Essex County, New Jersey declares a Code Blue due to dangerously low temperatures, effective December 1 through December 9, activating warming stations for homeless residents at night.
In South Mississippi, shelters will open December 2 as temperatures drop to the low 30s, providing overnight options.
Oklahoma braces for cold weather with possible light snow and freezing drizzle, especially in northern areas, as temperatures stay in the 30s.

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