Heat Warning for Leeds & Grenville

A Heat Warning has been issued by Environment Canada for all areas of Leeds & Grenville, including Gananoque, Mallorytown, Brockville and Prescott.

“A heat event expected to begin on Sunday and may continue into Tuesday. A hot and humid airmass will reach southern Ontario Sunday,” Environment Canada said in an advisory.

Daytime maximum temperatures in the region are expected to be 29 to 31 degrees celsius, with humidex values near 40.

“There will be little relief at night as minimum temperatures are expected to be near 20 degrees celsius,” Environment Canada said.

“Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category,” Environment Canada warned.

A cooler airmass is expected to arrive Tuesday night, providing some relief.

“Extreme heat can affect everyone’s health. Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration,” Environment Canada advised. “Limit direct sun exposure. Shade yourself by wearing a wide-brimmed, breathable hat and/or an umbrella. Never leave people, particularly children, or pets inside a parked vehicle. Ask a health professional, such as a pharmacist or physician, how medications or health conditions can affect your risk in the heat.”