Winter storms are a defining feature of life in Denver, Colorado. While many residents appreciate the beauty of fresh snowfall and the opportunities for skiing, snowboarding, and other cold-weather activities, severe winter storms also create significant health hazards. Heavy snow, subfreezing temperatures, icy roads, power outages, and prolonged isolation can affect nearly every aspect of physical and mental well-being.

Denver's unique elevation—more than 5,000 feet above sea level—adds another layer of complexity. The thinner air already requires the heart and lungs to work harder, and combining high altitude with freezing temperatures and strenuous physical activity can increase the risk of serious medical emergencies. Winter storms may also disrupt transportation, delay emergency services, and temporarily limit access to medications or healthcare facilities.

Understanding these health risks and preparing in advance can dramatically reduce the likelihood of injury or illness during severe winter weather.

Why Winter Storms Are Especially Dangerous in Denver

Denver experiences rapidly changing weather patterns. A mild afternoon can quickly transition into a heavy snowstorm overnight, accompanied by strong winds and dangerously low wind chills. Snowfall can accumulate rapidly, making roads impassable and increasing the likelihood of vehicle accidents, falls, and exposure-related illnesses.

Cold temperatures affect the body in several ways:

• Blood vessels constrict to conserve heat.
• Blood pressure often rises.
• The heart must work harder.
• Muscles become less flexible.
• Reaction times slow.
• Breathing cold, dry air can worsen respiratory conditions.

For older adults, young children, individuals with chronic illnesses, and people experiencing homelessness, these risks become even greater.

Heart Attack Risk From Snow Shoveling

One of the most underestimated winter hazards is snow shoveling. Every year, emergency departments across snowy regions treat patients suffering heart attacks shortly after clearing driveways or sidewalks.

Snow shoveling combines several factors that strain the cardiovascular system:

• Heavy lifting
• Twisting movements
• Cold air exposure
• Elevated blood pressure
• Increased heart rate

Wet snow is particularly dangerous because it weighs significantly more than dry powder. Even a relatively small section of sidewalk may require moving hundreds of pounds of snow.

Cold temperatures cause arteries to narrow, reducing blood flow while simultaneously increasing blood pressure. At the same time, lifting heavy snow dramatically increases oxygen demand by the heart. For individuals with coronary artery disease or undiagnosed cardiovascular conditions, this combination may trigger a heart attack.

If you have high blood pressure, diabetes, high cholesterol, obesity, or a previous history of heart disease, snow removal should be approached with extreme caution.

If you have a heart condition, check the Denver winter storm warning today before deciding whether to shovel—during an active warning, heavy wet snow combined with cold air significantly increases cardiac risk.

Warning Signs of a Heart Attack

Seek emergency medical attention immediately if you experience:

• Chest pressure or tightness
• Pain radiating to the arm, jaw, neck, or back
• Shortness of breath
• Cold sweat
• Nausea
• Sudden fatigue
• Dizziness

Women may experience less typical symptoms, including unexplained fatigue, indigestion-like discomfort, nausea, or upper back pain.

Safer Snow Removal Tips

Reduce cardiovascular strain by:

• Warming up indoors before starting.
• Wearing layered clothing.
• Using a smaller shovel.
• Pushing snow instead of lifting whenever possible.
• Taking frequent breaks.
• Staying hydrated.
• Avoiding alcohol beforehand.
• Hiring professional snow removal if you have significant heart disease.

Understanding Hypothermia

Hypothermia occurs when the body's core temperature falls below 95°F (35°C). It develops when heat loss exceeds heat production.

Although many people associate hypothermia with wilderness survival, it frequently occurs in urban environments during severe winter storms.

People at greatest risk include:

• Older adults
• Infants
• Outdoor workers
• Homeless individuals
• People stranded in vehicles
• Individuals living in poorly heated homes

Wet clothing accelerates heat loss dramatically. Even temperatures slightly above freezing can become dangerous when combined with moisture and wind.

Early Symptoms

Recognizing hypothermia early can prevent life-threatening complications.

Common symptoms include:

• Persistent shivering
• Numbness
• Slurred speech
• Confusion
• Poor coordination
• Fatigue
• Difficulty concentrating

Advanced Symptoms

As body temperature continues falling:

• Shivering may stop.
• Pulse slows.
• Breathing becomes shallow.
• Confusion worsens.
• Drowsiness increases.
• Consciousness declines.

Without prompt treatment, severe hypothermia may lead to cardiac arrest.

First Aid

If hypothermia is suspected:

• Move the person indoors immediately.
• Remove wet clothing.
• Replace with dry, insulated layers.
• Wrap in blankets.
• Warm the chest, neck, and groin using warm (not hot) compresses.
• Offer warm beverages if fully alert.
• Avoid alcohol.
• Avoid direct high heat.

Anyone with moderate or severe hypothermia requires emergency medical evaluation.

Frostbite: Permanent Damage Can Happen Quickly

Frostbite occurs when skin and underlying tissues freeze.

Extremities are most vulnerable:

• Fingers
• Toes
• Nose
• Ears
• Cheeks

Wind chill greatly accelerates frostbite development.

Symptoms

Early signs include:

• Tingling
• Burning sensation
• Numbness
• Pale or waxy skin

As frostbite worsens:

• Skin hardens.
• Blisters develop.
• Tissue may turn blue, purple, or black.

Permanent nerve damage and tissue loss can occur if treatment is delayed.

Proper Frostbite Treatment

If frostbite is suspected:

Move indoors immediately.

Do not:

• Rub affected skin.
• Massage frozen tissue.
• Use direct heat from stoves or heating pads.
• Break blisters.

Instead:

• Immerse the area in warm (not hot) water between 98°F and 104°F.
• Continue warming for 20–40 minutes.
• Cover with sterile dressings.
• Separate affected fingers or toes with gauze.

Medical evaluation is recommended for all but the mildest cases.