Severe Thunderstorm Watch issued for Mississauga; damaging winds and heavy rain possible today

Severe Thunderstorm and Tornado Watch issued for Mississauga; damaging winds and heavy rain possible today

Environment and Climate Change Canada has issued a Yellow Level Severe Thunderstorm Watch and Red Tornado Warning for Mississauga.

Emergency and public safety | July 18, 2026

Residents should take cover immediately if threatening weather approaches and continue to monitor weather alerts and local media for updates.

Storm conditions are expected to continue through the afternoon across much of southern Ontario. Given the localized nature of thunderstorms and tornadoes, exact impacts and locations can be difficult to predict until storms develop and move into the area.

Storm conditions are expected to begin around noon today, with the most significant impacts anticipated through the early afternoon. These thunderstorms are expected across much of southern Ontario.

This storm brings a risk of damaging wind gusts and the potential for heavy rain and large hail.

Periods of heavier rain may lead to higher water levels across the city. For safety, residents are urged to:

Wet weather can create hazardous conditions. Residents are reminded to:

Pedestrians and cyclists should take extra care. Wet surfaces may be slippery and visibility may be reduced.

To report a fallen or unsafe tree:

Understanding weather alert colours

Environment and Climate Change Canada uses colour-coded weather alerts to help people quickly understand the level of risk. The potential risk increases from yellow, to orange, to red.

What is a flood watch or warning?

If a flood warning has been issued, act immediately to protect yourself from danger and your home from flood damage.

Small steps can help reduce risk:

The City of Mississauga is monitoring weather conditions and local waterways.

City crews will monitor storm drains and respond to flooding or water pooling. Residents can report issues online or by calling 311 (or 905-615-4311 from outside city limits). The City’s Office of Emergency Management continues to work with conservation authority partners.

Weather conditions can change quickly. Residents are encouraged to:

For flooding concerns, call 311.

City of Mississauga Media Relations media@mississauga.ca 905-615-3200, ext. 5232 TTY: 905-896-5151 Get email updates