Ontario Severe Thunderstorm and Heat Risk
Key Questions
What weather risks is Ontario facing this week?
Ontario is bracing for building heat and humidity along with severe thunderstorm risks, including a potential tornado threat later in the period.
What new system has Environment Canada introduced?
Environment Canada has launched a new 36-hour advanced thunderstorm outlook system to help with preparedness for severe weather.
Have any tornado warnings been issued in Ontario?
Yes, officials are seeking damage reports after tornado warnings in areas like Kenora following an early-morning storm.
Ontario bracing for building heat, humidity, and severe thunderstorm risks this week, with potential tornado threat later. New 36-hour advanced thunderstorm outlook system from Environment Canada. Forecast highlights need for preparedness.
Sources (2)
Updated Jun 11, 2026