Sarnia

July 15, 2025 Evening News

Sarnia News Today

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The 519 Podcast

Humidex values reaching 35 are expected for more than 5 days.

A prolonged period of hot and humidity continues.

What:
Daytime highs of 31 to 34 degrees Celsius and a humidex of 37 to 42.
Overnight lows of 19 to 21 degrees Celsius, providing little relief from the heat.

When:
Continuing through Thursday.

Additional information:
A cooler airmass is expected to arrive on Thursday night bringing an end to this heat event.

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For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html

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.

Elevated levels of pollution due to ground level ozone is expected again today.

Air Quality Health Index (AQHI) values are expected to reach moderate to high risk this afternoon and evening as elevated levels of ozone are expected.

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When air pollution levels are high, everyone should 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 outdoor air pollution, 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.

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.

The day will start with partly cloudy through the late morning hours, transitioning to clearing

The day will start with clear sky through the late morning hours, transitioning to partly cloudy

A severe thunderstorm watch ended Thursday evening after strong storms moved through the region.The weather agency tracked a system that brought heavy rain, hail, and high winds to the area.The possibility of tornadoes was also there, and a marine tornado warning was issued for the Georgian Bay area.A series of thunderstorm warnings were also issued as storms passed through Grey and Bruce Counties.Areas north of Georgian Bay experienced severe storms and the possibility of tornadoes. The watches were lifted just before 9 p.m. Thursday.

Storm clouds, June 18, 2014. (Photo courtesy of Amy via the Blackburn Radio app)

Midwestern

Windsor

London

Chatham

Hazy conditions in midwestern Ontario from wildfire smoke, June 5, 2025. (Photo by Eric Thompson, Blackburn Media) 

Plympton-Wyoming Fire Department. Photo courtesy of the Wyoming Volunteer Firefighters Association via Facebook. 

Transport truck on highway (Image courtesy of Can Stock)

OPP Cruiser. (Photo from WR OPP twitter account)

UPDATE: Severe thunderstorm watch ends in southwestern Ontario

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