Extreme heat can turn dangerous fast. Who is most vulnerable?
Global News
Do you know the signs of dangerous heat stroke? With a scorching heat wave set for parts of central Canada, what to know about who is most at risk.
Doctors and health-care experts are warning Canadians to not only look after themselves but also check on others who could be vulnerable as large parts of central Canada face a sweltering heat wave.
Global News chief meteorologist Anthony Farnell says a large heat ridge or dome will build over the Ohio Valley in the U.S. and expand into southeastern Canada by the end of the weekend.
Temperatures are expected to reach the low to mid-30s C and the humidex could make that feel much higher, with humidex readings potentially into the mid-40s.
When heat hits those levels, the body has to work harder to keep itself cool.
“The hypothalamus acts as the thermostat and sends signals to the heart to start beating faster, sends signals to our body to breathe a little faster and that helps the blood flow to the extremities so that we can dissipate heat through radiant heat loss,” said Dr. Samantha Green, a family physician at Unity Health Toronto with expertise in climate change and health.
“It also sends signals so that we can cool down through evaporative cooling through sweating.”
Prolonged exposure to heat can impact the human body in a variety of ways.
One of the most common is heat exhaustion, which can lead to heat stroke.
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