Canada's extreme heat can be extremely dangerous for seniors. Here's what to know, plus how to stay cool

Yahoo

24-06-2025

Our favourite summer activities are put on hold when the temperatures creep dangerously high. On Monday, Environment Canada issued an dangerous heat and humidity warning for parts of Ontario; temperatures in certain areas of the province are expected to reach as high as 46 degrees Celsius. While extreme heat can be dangerous for everyone, seniors in particular, are vulnerable to heat exhaustion and heat stroke is something all ages should consider during warmer months.
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Contact a qualified medical professional before engaging in any physical activity, or making any changes to your diet, medication or lifestyle.
A version of this story was originally published in 2024.
With the help of Dr. Christina Reppas-Rindlisbacher, a geriatrician at Toronto's Sinai Health and the University Health Network, here's how seniors can keep cool and healthy all summer long.
As we age, our bodies become less efficient at regulating temperature. As a geriatrician and general internist working at a busy downtown hospital, Reppas-Rindlisbacher says she sees an increase in heat-related illnesses in older adults during summer.
She also tells Yahoo Canada the risk of falls in seniors rises in the summer months due to dehydration or heat exhaustion. Here are some helpful tips to keep cool and hydrated:
Stay cool indoors: Make sure your air conditioning is in good working order, and get it serviced annually. During particularly hot days, minimize outdoor time, especially between 11 a.m. and 6 p.m. when the sun is strongest.
Hydrate regularly: Don't wait until you're thirsty to drink fluids. Carry a reusable water bottle and sip on cool water or non-sugary sports drinks throughout the day.
Dress for the weather: Opt for loose-fitting, lightweight clothing made from breathable fabrics like cotton, and wear footwear that will protect feet from hot surfaces. This is especially beneficial for older adults with neuropathy in their feet.
Symptoms of heat exhaustion include cramps, headaches, dizziness, nausea or vomiting, thirst and fatigue. If you do experience any of these, here's how you can cool down your body to avoid getting heat stroke:
Find shade or go inside an air-conditioned building
Sit in front of a fan after spraying yourself with cool water
Remove extra layers of clothing
Apply an ice pack or cold cloth to your neck, armpits and groin
Drink water or sports drinks and avoid alcohol or caffeine
Take a cool bath or shower
Exposure to harsh sun rays should be a concern for all ages, but it's particularly important that seniors protect themselves since they have fewer melanocytes. These are cells that produce melanin, which protects skin from sunburns. This reduction in melanin production makes seniors more susceptible to sun damage and skin cancer. Seniors can protect their skin by:
Applying sunscreen daily: Apply a broad-spectrum sunscreen with SPF 30 or higher daily, even on cloudy days. Look for formulas with hydrating ingredients like ceramides, glycerin and hyaluronic acid to nourish your skin.
Choosing whatever you will use: There is a lot of debate about mineral vs. chemical sunscreens, but they both protect against UV radiation. According to Reppas-Rindlisbacher, "The best sunscreen is the one that people are most likely to use daily."
Wearing sun protection gear: When outdoors, wear a wide-brimmed hat and sunglasses to shield your face and eyes from UV rays.
Certain medical conditions and medications can increase a senior's risk of heat-related illness. Dr. Reppas-Rindlisbacher highlights some to watch out for:
Medical conditions: Diabetes, heart disease and dementia can make seniors more vulnerable to heat stroke. Heavy alcohol use, obesity and frailty are also risk factors.
Medications: Diuretics, certain pain relievers (NSAIDs) and some medications for bladder control, depression and allergies can affect hydration or heat regulation.
If you take any of these medications, it's important to discuss summer safety strategies with your health-care provider.
During hot spells, it's crucial for seniors to have a support system in place. Caregivers and family members can help by:
Giving daily check-ins: Regularly check on older loved ones, especially during heat waves.
Offer hydration reminders: Help seniors stay hydrated by reminding them to drink fluids throughout the day.
Limiting outdoor activity: Discourage outings during peak sun hours and encourage staying cool indoors.
Helping prevent falls: Consider buying a medical alert system that includes detection for added peace of mind.