Active Weather Alerts
Squall Watch
Issued: 4:38 PM Jul. 18, 2026 – Environment and Climate Change Canada
Conditions are favourable for the development of squalls with wind gusts up to 55 knots, frequent lightning, hail and poor to very poor visibility in thunderstorms heavy at times. Thunderstorms are expected today with strong wind gusts. The strongest thunderstorms are expected this afternoon as a cold front moves through from the northwest. ### Large hail can damage vessels and cause injury. Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
Orange Watch - Severe Thunderstorm
Issued: 4:25 PM Jul. 18, 2026 – Environment and Climate Change Canada
Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing damaging wind gusts, large hail and heavy rain. What: Wind gusts up to 110 km/h. Quarter to ping pong ball sized hail. Rainfall amounts 25 to 40 mm. Risk of tornadoes. When: Beginning near noon into this afternoon. Additional Comments: A cold front over Michigan is expected to bring a line of thunderstorms as it moves southeast over the area today. The strongest thunderstorms are expected early this afternoon. ### Utility outages are possible. Significant damage to property, buildings and trees is possible. Fast-moving and rapidly rising water can sweep vehicles away and damage infrastructure. Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm. For more information: https://www.ontario.ca/page/be-prepared-emergency.
Yellow Warning - Air Quality
Issued: 2:42 PM Jul. 18, 2026 – Environment and Climate Change Canada
Poor air quality and reduced visibility due to wildfires will improve gradually this morning. After a break of a few hours this afternoon, poor air quality may return by this evening and persist into Sunday morning. A major improvement is expected on Sunday. ### As smoke levels increase, health risks increase. Limit time outdoors. Consider reducing or rescheduling outdoor sports, activities and events. You may experience mild and common symptoms such as eye, nose and throat irritation, headaches or a mild cough. More serious but less common symptoms include wheezing, chest pains or severe cough. If you think you are having a medical emergency, seek immediate medical assistance. People more likely to be impacted by wildfire smoke, including people aged 65 and older, pregnant people, infants and young children, people with an existing illness or chronic health condition, and people who work outdoors, should reduce or reschedule strenuous activities outdoors and seek medical attention if experiencing symptoms. For further information visit the website https://www.airqualityontario.com/ or contact the Ontario Ministry of the Environment, Conservation and Parks at 416-314-6666. Visit http://www.airhealth.ca for information on how to reduce your health risk and your personal contribution to pollution levels, as well as for current and forecast AQHI values. Please continue to monitor alerts and forecasts issued by Environment Canada.
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