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An Introduction to Cold Wave Safety in the United States

June 18, 2026 · The Clime Team
An Introduction to Cold Wave Safety in the United States

Cold waves, characterized by prolonged periods of extremely cold temperatures, pose significant risks to health and safety across the United States. Understanding how to prepare for and respond to these conditions is crucial.

What Is a Cold Wave?

A cold wave is a rapid and sustained drop in temperature over a 24-hour period, leading to dangerously cold conditions. These events can result in hypothermia, frostbite, and other cold-related illnesses. The National Weather Service defines extreme cold as temperatures at or below 0°F, and a cold wave as two or more consecutive days with such temperatures. (onondaga.gov)

How Can I Prepare for a Cold Wave?

Plan Ahead: Develop a communication and disaster plan for your family. Ensure all members know how to reach each other and where to go in case of an emergency. (cdc.gov)

Home Preparation: Insulate pipes to prevent freezing, and let faucets drip to keep water moving. Keep extra blankets and warm clothing accessible. Stock up on non-perishable food and essential medications. (mass.gov)

Vehicle Readiness: Keep your car's gas tank full to prevent fuel line freeze-up. Equip your vehicle with an emergency kit, including blankets, a flashlight, and non-perishable snacks. (cdc.gov)

What Should I Wear During a Cold Wave?

Layering: Dress in layers to trap body heat. Start with a moisture-wicking base layer, add an insulating layer like fleece, and finish with a waterproof and windproof outer layer. (case.edu)

Accessories: Wear a hat, scarf, and mittens to protect extremities. Mittens are generally warmer than gloves. (case.edu)

Footwear: Choose insulated, waterproof boots to keep feet dry and warm. Wear thick, moisture-wicking socks, and consider wearing two pairs for added warmth. (case.edu)

How Can I Stay Safe During a Cold Wave?

Limit Exposure: Stay indoors as much as possible. If you must go outside, limit your time and take frequent breaks to warm up. (cdc.gov)

Stay Dry: Wet clothing can increase heat loss. If your clothing becomes wet, change into dry, warm clothes immediately. (cdc.gov)

Monitor Health: Be aware of signs of hypothermia (shivering, confusion, slurred speech) and frostbite (numbness, pale skin) in yourself and others. Seek medical attention if symptoms occur. (mass.gov)

Stay Informed: Keep updated with weather forecasts and heed any warnings or advisories issued by local authorities. (cdc.gov)

What Should I Do After a Cold Wave?

Check for Damage: Inspect your home for frozen pipes, roof damage, or other issues caused by the cold. If you find problems, contact professionals for repairs. (mass.gov)

Restock Supplies: Replace any emergency supplies used during the cold wave. Ensure your emergency kit is complete and ready for future use. (cdc.gov)

Stay Vigilant: Even after the cold wave has passed, continue to monitor weather conditions, as subsequent cold fronts can follow. (cdc.gov)

By understanding the risks associated with cold waves and taking proactive steps to prepare, you can significantly reduce the dangers posed by extreme cold temperatures.

Highlights:

  • Snow survival 101: How to stay safe during a winter storm, Published on Wednesday, January 21

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