Heat warning issued for Hamilton and Niagara

A heat event is expected today (June 22) in the Hamilton and Niagara regions, and it may extend overnight.

According to Environment Canada, daytime highs are expected to range from 28 to 31 degrees Celsius, with humidex values approaching 40.

Little relief is expected overnight, with lows between 18 and 21 degrees Celsius.

The following areas are impacted by the heat warning:

• Niagara
• Niagara Falls
• Niagara On the Lake
• St Catharines
• Welland
• Lincoln
• Hamilton

Less hot and humid conditions are forecasted to gradually move into the area on Sunday, though there is some uncertainty about how quickly the cooler and drier airmass will move in.

As a result, heat warnings may persist in some areas through Sunday. Temperatures and humidex values near the Great Lakes may be several degrees cooler.

In addition, hot and humid air can also lead to deteriorating air quality, potentially pushing the Air Quality Health Index into the high-risk category.

Environment Canada advises residents to drink plenty of water regularly to decrease the risk of dehydration, even before they feel thirsty, as thirst is not a reliable indicator.

The health risks of this heat event are higher for older adults, infants and young children, pregnant individuals, people with physical or mental illnesses, and those with disabilities or mobility issues.

Individuals are urged never to leave people inside a parked vehicle, especially children or pets.

“Be aware of the signs of heat illness, including swelling, rash, cramps, fainting, heat exhaustion, heat stroke, and worsening preexisting health conditions,” Health Canada says.

Heat stroke is a medical emergency. If someone has a high body temperature, is confused, has stopped sweating, or becomes unconscious, call 911 or your local emergency number immediately.

While waiting for help, individuals should move the person to a cool place, apply cold water to large areas of their skin, and fan them as much as possible.

Residents can monitor further alerts and weather updates on Environment Canada’s website.