Extreme heat

Extremely high humidity can be hazardous to your health. Check in on your neighbours on hot days.

Extreme heat events involve high temperatures and sometimes high humidity. Although the level of temperature extremes may vary between regions, high heat can negatively impact your health.

What are the dangers of hot weather?

Extreme heat can put your health at risk, causing heat stroke, dehydration and even death. It is important to protect yourself and your family. With hot weather usually comes bright sunshine, and potentially poor air quality.

What is the humidex?

High humidity can cause the air temperature to feel hotter than it actually is. That’s because when people sweat to cool down, this perspiration cannot evaporate as easily in moist, saturated air. The Government Canada calculates and publishes the humidex reading to let people know how hot it feels with the humidity.

What is Public Health Sudbury & Districts role on hot days?

Public Health Sudbury & Districts is responsible for declaring heat advisories, heat alerts, and extreme heat alerts under the City of Greater Sudbury Hot Weather Response Plan. These alerts notify the public of extreme heat warnings, with additional response from the City depending on the alert level.

Who is at risk?

Even healthy people and pets can get sick because of hot weather. The following groups are at higher risk and need to be sun safe:

High heat and humidity can also be a threat if you live in a building that does not have adequate cooling.

What should I do before an extreme heat event?

To prepare for an extreme heat event, you should:

What should I do during an extreme heat event?

For more information on extreme heat or to speak to a public health inspector call 705.522.9200 or toll-free at 1.866.522.9200.

This item was last modified on July 7, 2022