Brockville, Eastern Ontario News, Gananoque - 1000 Islands, Headlines, Latest, Leeds & Grenville, Local News, News, North Grenville - Merrickville-Wolford, South Grenville, Weather, Weather Alerts, Weather News Heat Warning Issued By Environment Canada for Brockville – Leeds and Grenville Beginning on Sunday by Environment Canada September 2, 2023 0 Brockville – A Heat Warning has been issued for Brockville, Leeds-Grenville with humidex values reaching...... Read more.