Mississauga faces thunderstorm risk, heavy rain and possible local flooding today

Mississauga residents should prepare for heavy rain, strong winds and possible localized flooding today, July 21, with the greatest risk of storm impacts expected later in the day, according to a City of Mississauga news release.

Environment and Climate Change Canada has issued a Yellow Level Severe Thunderstorm Watch for the area. The Toronto and Region Conservation Authority and Credit Valley Conservation have also issued a Flood Outlook Statement.

The City says storm activity could develop during the morning and carry into the afternoon as weather conditions develop across southern Ontario. The timing and severity remain uncertain, and the forecast may change as the day progresses.

Heavier periods of rain could raise water levels across Mississauga. The City is urging residents to be ready for conditions that may change rapidly, including strong winds and flooding in localized areas.

Wet conditions may affect walking and cycling

Pedestrians and cyclists are being advised to take extra care in the wet weather. Surfaces may become slippery, while reduced visibility could make conditions more hazardous.

The City's notice identifies heavy rain, wind and higher water levels as potential concerns. It does not provide a specific rainfall amount or a precise time for storms to reach Mississauga.

City monitoring waterways and storm drains

The City says it is monitoring local waterways and weather conditions in collaboration with Environment and Climate Change Canada and its conservation authority partners.

City crews are also checking storm drains and responding as needed. Residents can report issues online or call 311. Anyone calling from outside Mississauga can reach the service at 905-615-4311.

Those monitoring weather alerts will see Environment and Climate Change Canada's colour-coded system, which is intended to make the level of risk easier to understand. Potential risk rises from yellow to orange to red; the thunderstorm watch identified in the City's July 21 notice is yellow.

The City also advises residents to act immediately to protect themselves and their homes if a flood warning is issued. The conservation authority notice reported in the release is a Flood Outlook Statement.

With the storm's timing and severity still uncertain, the City is urging residents to remain prepared for changing conditions throughout the day.