Why Outside AED Access Matters More Than Ever When It’s Cold
If you live in a cold winter climate, you know all about icy roads, frozen pipes, and long, dark nights. What we don’t always think about is the very real effect cold weather has on the human heart. Yet year after year, research continues to show a clear seasonal pattern: winter is one of the highest-risk seasons for Sudden Cardiac Arrest (SCA) and Sudden Cardiac Death (SCD). ¹
Cold weather affects the heart in several important ways. Blood vessels constrict. Blood pressure rises. The heart works harder to circulate warm blood. And when you combine that with physical activity — like shoveling snow, skiing, or simply walking to school or work — the risk increases even more.²
In other words, winter creates a perfect storm for heart-related trauma, including sudden cardiac arrest emergencies.
What the Research Says About Cold Weather and Sudden Cardiac Arrest
While not every cold-weather cardiac event is a sudden cardiac arrest, multiple large-scale studies do show a measurable increase in out-of-hospital cardiac arrest (OHCA) and sudden cardiac death (SCD) during colder temperatures and winter months. ⁴
Here’s what the research confirms:
- Large population registry studies show that lower ambient temperatures are associated with increased incidence of out-of-hospital cardiac arrest and worse survival outcomes. ³
- A 2024 U.S. study focused specifically on sudden cardiac death found a higher risk during colder temperature exposure, particularly in individuals with underlying heart conditions. ¹
- Cold exposure increases known physiologic triggers for SCA², including:
- Elevated blood pressure
- Increased blood thickness and clotting risk
- Higher cardiac workload
- Increased risk of dangerous heart rhythm disturbances
- Strenuous winter activities — especially snow shoveling — are well documented as triggers for both heart attack and sudden cardiac arrest, especially in vulnerable individuals. ⁵
And unfortunately, in any season, the closest AED is often locked behind a door that no one can reach. This is especially troublesome in winter when risk is increased and facilities are often closed, locked, and inaccessible more frequently than in other seasons.
Why Outdoor AEDs Change the Story
Sudden Cardiac Arrest doesn’t wait for warm weather, daylight, or business hours. It doesn’t pause because a park gate is locked or a school building is closed for the night. But too often, the only AED in the area is inside a building that no one can access when they need it most.
That’s why communities across the country are placing lifesaving AEDs outdoors- to enable 24/7 public access and availability where anyone can reach them at any time.
The Most Important Characteristics to Consider for Outdoor AED Cabinets in Winter:
- Highly-Visible, Illuminated Presence so everyone knows where the AED is, especially during winter months when darkness comes early
- All-Weather Protection to guard against snow, sleet, ice, and wind
- Temperature-controlled so the AED battery and pads stay within safe operating range when outdoor temperatures are often freezing for prolonged periods
- Smart-monitored so communities know the unit is online, accessible, and ready
- 24/7 Access with Back-up Power during power outages or severe weather
Without these protections, an AED placed outside is at risk of freezing, malfunctioning, or becoming unusable when someone’s life depends on it.
A “box on a pole” isn’t enough. Winter requires equipment built for winter.
If your community is considering installing AEDs outside, it helps to have the facts, understand capabilities (or limitations), and know your options. Call SaveHeart by HeartNation to set up a conversation about doing it right.
Cold Weather Planning Starts Now
If you’ve been thinking about adding outdoor AED access to your park, school, sports complex, trail system, or outdoor community facilities, winter is actually the best time to start the process.
Here’s why:
Business and budget decisions take time.
Grant applications, board approvals, budgeting, and installation often require advance planning.
Spring arrives fast.
Outdoor sports begin, parks fill up, and trails get busy much sooner than you think, and long before summer. AEDs need to be in place before people return.
More and more people are using your facilities NOW, in the wintertime. Take advantage of the year-end/seasonal discount program this winter, or at least start the process now so you’re not caught off guard when the cold returns again next year, bringing with is increased cardiac emergency risk in your community.
Starting the conversation today gives you time to choose the right locations, build support, and secure funding. And remember, SaveHeart by HeartNation can help, sharing lessons learned and best practices from our work with communities all across the country.
A Simple Step That Saves Lives
Sudden Cardiac Arrest (SCA) is the leading cause of natural death in the United States, striking people of all ages and health backgrounds without warning. And while not all sudden cardiac arrest emergencies, you can make sure your community is protected through the latest tools and technology so that help is always within reach. SCA happens at any time, and research shows risk increases during colder weather.
When it does happen, AEDs must be visible and accessible— not locked inside a building or unavailable ‘after hours’ during dark and cold winter conditions, when risk is greatest.
Outdoor, temperature-controlled, smart-monitored AED access gives every community and what every person deserves: a real chance at survival.
For more information about placing AEDs outdoors in highly visible, 24/7 accessible, all-weather protected, temperature-controlled cabinets in your community, contact us at SaveHeart by HeartNation.
References
¹ Seasonal variation and cold temperature exposure associated with increased risk of sudden cardiac death
https://pmc.ncbi.nlm.nih.gov/articles/PMC11233109/
² Physiological effects of cold exposure on cardiovascular strain and cardiac workload
https://pmc.ncbi.nlm.nih.gov/articles/PMC6204981/
³ Association between ambient temperature and out-of-hospital cardiac arrest incidence and outcomes
https://www.sciencedirect.com/science/article/pii/S2666520424002017
⁴ Cold weather exposure and sudden cardiac arrest risk: clinical review and population findings
https://www.cureus.com/articles/338303
⁵ Snow shoveling and cold temperatures as triggers for cardiac emergencies (American Heart Association)
https://newsroom.heart.org/news/snow-shoveling-cold-temperatures-combine-for-perfect-storm-of-heart-health-hazards