Heat warning remains in effect in Niagara

Extreme heat event for the Canada Day long weekend and this will be the most significant heat event in the past few years.

On Canada Day, daytime highs are forecast to reach the mid thirties with humidex values into the mid forties. Daytime highs in the low thirties are expected to persist through most of next week. Overnight low temperatures are expected to be in the low to mid twenties, except high teens in some rural areas, providing little or no relief from the heat.


Never leave people or pets inside a parked vehicle.

Extreme heat affects everyone.

The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.

Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.

Heat stroke is a medical emergency. If you feel dizzy or disoriented seek medical attention. Call 911 or your local emergency number. If someone has a high temperature and is unconscious or confused or has stopped sweating. Cool the person right away.

Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.