The summer of 2026 is predicted to be exceptionally hot. Compounding the already increasing global temperatures, warming ocean waters due to El Niño are expected to create sweltering conditions. Understanding how to stay safe in this extreme heat is crucial.
Beyond the common warnings about heat stroke, you might not be aware that certain everyday medications can increase your vulnerability. Additionally, older adults are a population group at higher risk.
Knowing the difference between heat exhaustion and heat stroke, a medical emergency requiring immediate 911 assistance, is vital. Here’s essential information on heat exhaustion and heat stroke, who is most at risk, and how to protect yourself.
Distinguishing Heat Stroke from Heat Exhaustion
Heat exhaustion occurs when your body loses too much fluid and salt through dehydration or excessive sweating. Symptoms include dizziness, nausea, weakness, and muscle cramps. While serious, it’s generally not life-threatening and can often be managed by rehydrating with water and electrolytes, resting in a cool environment, loosening clothing, and applying cool compresses to the head, neck, and wrists.
Heat stroke, however, is a life-threatening condition where the body’s cooling mechanisms fail, leading to a rapid rise in internal temperature above 104 degrees Fahrenheit. This can cause severe damage to the brain and vital organs.
The key distinction lies in mental status. Dr. Ken Zafren, a professor of emergency medicine, explains that individuals experiencing heat exhaustion maintain normal cognitive function, whereas those with heat stroke exhibit altered mental states. Signs of heat stroke include confusion, unusual behavior, seizures, an inability to answer basic questions, or unconsciousness. In such cases, call 911 immediately. While awaiting emergency services, do all you can to cool the person down – immerse them in cool water, spray them, fan them while misting, or apply ice packs to critical areas like the neck, armpits, and groin. Cold, wet sheets can also be used for covering.
Heat exhaustion can progress to heat stroke if left untreated, but heat stroke can also occur independently, without prior heat exhaustion symptoms.
Medications That Increase Heat Sensitivity
Several common medications can make individuals more susceptible to heat-related illnesses. These include drugs for high blood pressure, aspirin, antidepressants, antipsychotics, mood stabilizers, and medications for ADHD, among others. A comprehensive list is available from the CDC. These medications can interfere with the body’s natural cooling processes, and taking multiple such medications can have a compounded effect. If you are prescribed any of these, it’s advised to continue taking them but to exercise extra caution in hot weather.
Factors Influencing Heat-Related Illness Risk
Age, humidity, and activity levels all play a role in the risk of heat-related illnesses.
Children have less efficient sweating mechanisms, smaller body surface areas for cooling, and may spend more time outdoors without adequate hydration breaks. Adult supervision, enforcing hydration and shade breaks, and avoiding strenuous activities during the hottest parts of the day are crucial for their safety.
Older adults face increased risk due to age-related decline in temperature regulation mechanisms, such as blood vessel responsiveness. They are also more likely to be taking multiple medications that increase heat sensitivity. Geriatric medicine specialists recommend that older adults stay hydrated, exercise indoors, and utilize public cooling centers if air conditioning is unavailable at home.
High humidity exacerbates the risk because sweat needs to evaporate to cool the body, which is less effective in humid conditions. The heat index, which combines temperature and humidity, provides a better measure of the actual heat stress. The National Weather Service advises extreme caution for prolonged outdoor exposure or exercise when the heat index exceeds 90 degrees Fahrenheit. The CDC’s Heat Risk forecast can also provide localized risk information.
Intense physical exertion significantly elevates the risk of heat stroke, even in moderately hot conditions.
Preventing Heat-Related Illnesses
Staying hydrated by drinking plenty of water is paramount to preventing dehydration and reducing the risk of heat-related illnesses. Here are additional strategies for staying safe while enjoying the summer:
- Adjust Plans: Check the heat index before outdoor activities. If the risk is high, consider rescheduling or moving indoors. Avoid outdoor activities during the peak heat hours, typically from midday to late afternoon.
- Dress Appropriately: Wear light-colored, loose-fitting clothing. Tight garments can impede sweat evaporation and trap heat.
- Seek Cool Environments: Take regular breaks in shaded areas or air-conditioned spaces. Utilize local cooling centers if air conditioning is not available at home.
- Moderate Physical Activity: If engaging in exercise or strenuous work, take frequent breaks to cool down and rest.