Environment Canada placed several regions of southern and western Quebec under a severe thunderstorm watch on Tuesday, July 21, 2026, after forecasting torrential rain that could lead to flooding.
The watch signals that atmospheric conditions are favorable for intense thunderstorms accompanied by heavy precipitation. Meteorologists expect the rain to fall rapidly over short periods, increasing the likelihood of water levels rising quickly in low‑lying areas.
Officials warn that the projected rainfall intensity is sufficient to produce localized floods. Roads, drainage systems and small streams are particularly vulnerable when water accumulates faster than it can be conveyed away. Residents in affected zones should remain alert to changing conditions and be prepared for possible disruptions.
Environment Canada routinely monitors weather patterns across the province and issues watches when the potential for hazardous events rises. The agency’s mandate includes alerting the public and coordinating with local authorities to mitigate the impacts of extreme weather, such as the heavy rain that can trigger flash flooding in Quebec’s southern and western regions.