Montreal under heat warning for Sunday, Monday: Environment Canada

Environment Canada has issued a heat warning for the Montreal area, including Châteauguay, La Prairie, Laval, Longueuil and Varennes.

READ MORE: Montreal’s sizzling hot July 2018 nearly smashes 97-year-old heat record

Daytime highs near 30 degrees are expected Sunday and Monday, with humidex values nearing 40.

The weather agency is reminding residents to stay hydrated by drinking plenty of water — even before feeling thirsty — to stay in a cool place and reduce physical activities.

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The city of Montreal has announced that some of its outdoor aquatic facilities, including splash parks, will have extended opening hours.

WATCH: Osheaga adds extra measures to help festival-goers conquer Montreal heat wave

2:10 Keeping cool at Osheaga

Call 311 or log on to the City of Montreal website for more information and to check schedules.