Latest Alert For: Severe Weather
Multiple active bulletins issued for this subscription.
Latest bulletin issued on Monday June 29, 2026 15:40 EDT by Environment Canada.
- Simcoe - Delhi - Norfolk, Ont. (041100) Monday June 29, 2026 15:39 EDT
- Dunnville - Caledonia - Haldimand, Ont. (041200) Monday June 29, 2026 15:39 EDT
- Elgin, Ont. (041600) Monday June 29, 2026 15:39 EDT
- Oxford - Brant, Ont. (041700) Monday June 29, 2026 15:39 EDT
- City of Toronto, Ont. (043100) Monday June 29, 2026 15:40 EDT
- Uxbridge - Beaverton - Northern Durham Region, Ont. (043210) Monday June 29, 2026 15:39 EDT
- Newmarket - Georgina - Northern York Region, Ont. (043220) Monday June 29, 2026 15:39 EDT
- Pickering - Oshawa - Southern Durham Region, Ont. (043230) Monday June 29, 2026 15:39 EDT
- Vaughan - Richmond Hill - Markham, Ont. (043240) Monday June 29, 2026 15:40 EDT
- Belleville - Quinte - Northumberland, Ont. (043300) Monday June 29, 2026 15:39 EDT
- Barrie - Collingwood - Hillsdale, Ont. (044130) Monday June 29, 2026 15:39 EDT
- Lindsay - Southern Kawartha Lakes, Ont. (044730) Monday June 29, 2026 15:39 EDT
- Peterborough City - Lakefield - Southern Peterborough County, Ont. (044740) Monday June 29, 2026 15:39 EDT
- City of Hamilton, Ont. (046100) Monday June 29, 2026 15:40 EDT
- Listowel - Milverton - Northern Perth County, Ont. (046320) Monday June 29, 2026 15:39 EDT
- Stratford - Mitchell - Southern Perth County, Ont. (046340) Monday June 29, 2026 15:39 EDT
- Guelph - Erin - Southern Wellington County, Ont. (046420) Monday June 29, 2026 15:39 EDT
- Kitchener - Cambridge - Region of Waterloo, Ont. (046430) Monday June 29, 2026 15:39 EDT
- Innisfil - New Tecumseth - Angus, Ont. (046510) Monday June 29, 2026 15:39 EDT
- Caledon, Ont. (046610) Monday June 29, 2026 15:39 EDT
- Mississauga - Brampton, Ont. (046620) Monday June 29, 2026 15:40 EDT
- Halton Hills - Milton, Ont. (046630) Monday June 29, 2026 15:40 EDT
- Burlington - Oakville, Ont. (046640) Monday June 29, 2026 15:40 EDT
- Niagara, Ont. (046700) Monday June 29, 2026 15:40 EDT
- Fort William - Shawville area, Que. (031720) Monday June 29, 2026 15:14 EDT
- Lachute area, Que. (032320) Monday June 29, 2026 15:14 EDT
- Huntingdon area, Que. (032560) Monday June 29, 2026 15:14 EDT
- Midland - Coldwater - Orr Lake, Ont. (044110) Monday June 29, 2026 15:32 EDT
- Orillia - Lagoon City - Washago, Ont. (044120) Monday June 29, 2026 15:32 EDT
- Port Carling - Port Severn, Ont. (044430) Monday June 29, 2026 15:32 EDT
- Bracebridge - Gravenhurst, Ont. (044440) Monday June 29, 2026 15:32 EDT
- Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes, Ont. (044710) Monday June 29, 2026 15:32 EDT
- Apsley - Woodview - Northern Peterborough County, Ont. (044720) Monday June 29, 2026 15:32 EDT
- Bruce Peninsula - Sauble Beach - Tobermory, Ont. (046210) Monday June 29, 2026 15:32 EDT
- Mount Forest - Arthur - Northern Wellington County, Ont. (046410) Monday June 29, 2026 15:32 EDT
- Shelburne - Mansfield - Northern Dufferin County, Ont. (046520) Monday June 29, 2026 15:32 EDT
- Orangeville - Grand Valley - Southern Dufferin County, Ont. (046530) Monday June 29, 2026 15:32 EDT
- Sarnia - Lambton, Ont. (041300) Monday June 29, 2026 15:38 EDT
- Windsor - Essex - Chatham-Kent, Ont. (041400) Monday June 29, 2026 15:38 EDT
- London - Middlesex, Ont. (041500) Monday June 29, 2026 15:38 EDT
- Wingham - Blyth - Northern Huron County, Ont. (046310) Monday June 29, 2026 15:38 EDT
- Goderich - Bluewater - Southern Huron County, Ont. (046330) Monday June 29, 2026 15:38 EDT
- Owen Sound - Blue Mountains - Northern Grey County, Ont. (046220) Monday June 29, 2026 15:38 EDT
- Saugeen Shores - Kincardine - Southern Bruce County, Ont. (046230) Monday June 29, 2026 15:38 EDT
- Hanover - Dundalk - Southern Grey County, Ont. (046240) Monday June 29, 2026 15:32 EDT
Public Alert Areas Map
- Subscribed Site
- Subscribed Sub-Zone
- Subscribed Zone
-
Active Heat Warning
-
Ended/Cancelled Heat Warning
- EC Sub-Zone Border
Alert Details
Issued on Monday June 29, 2026 15:40 EDT
- City of Toronto, Ont. (043100)
- Vaughan - Richmond Hill - Markham, Ont. (043240)
- City of Hamilton, Ont. (046100)
- Mississauga - Brampton, Ont. (046620)
- Halton Hills - Milton, Ont. (046630)
- Burlington - Oakville, Ont. (046640)
- Niagara, Ont. (046700)
Impact Level: High
Forecast Confidence: Very high
A long duration heat event begins Tuesday.
What:
Maximum temperatures of 31 to 34 degrees Celsius, and potentially up to 37 degrees Celsius for some areas.
Minimum temperatures of 21 to 25 degrees Celsius.
When:
Tuesday through Friday, and possibly into the weekend.
Additional Information:
The hottest days are expected to be Wednesday and Thursday, with maximum temperatures of 34 to 37 degrees Celsius expected. Minimum temperatures of 21 to 25 degrees Celsius will provide little relief from the heat.
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category.
Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day.
Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water.
Heat stroke is a medical emergency! Call 9-1-1 or your emergency health provider if you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness. While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body.
Drink water often and before you feel thirsty to replace fluids.
Close blinds, or shades and open windows if outside is cooler than inside.
Turn on air conditioning, use a fan, or move to a cooler area of your living space. If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park.
Follow the advice of your region’s public health authority.
Plan and schedule outdoor activities during the coolest parts of the day.
Limit direct exposure to the sun and heat. Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat.
Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind.
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.
Issued on Monday June 29, 2026 15:39 EDT
- Simcoe - Delhi - Norfolk, Ont. (041100)
- Dunnville - Caledonia - Haldimand, Ont. (041200)
- Elgin, Ont. (041600)
- Oxford - Brant, Ont. (041700)
- Uxbridge - Beaverton - Northern Durham Region, Ont. (043210)
- Newmarket - Georgina - Northern York Region, Ont. (043220)
- Pickering - Oshawa - Southern Durham Region, Ont. (043230)
- Belleville - Quinte - Northumberland, Ont. (043300)
- Barrie - Collingwood - Hillsdale, Ont. (044130)
- Lindsay - Southern Kawartha Lakes, Ont. (044730)
- Peterborough City - Lakefield - Southern Peterborough County, Ont. (044740)
- Listowel - Milverton - Northern Perth County, Ont. (046320)
- Stratford - Mitchell - Southern Perth County, Ont. (046340)
- Guelph - Erin - Southern Wellington County, Ont. (046420)
- Kitchener - Cambridge - Region of Waterloo, Ont. (046430)
- Innisfil - New Tecumseth - Angus, Ont. (046510)
- Caledon, Ont. (046610)
Impact Level: High
Forecast Confidence: Very high
A long duration heat event begins Tuesday. For some areas, this is the first heat event of the season.
What:
Maximum temperatures of 31 to 33 degrees Celsius, possibly as high as 36 degrees Celsius.
Minimum temperatures of 21 to 24 degrees Celsius.
When:
Tuesday through Friday, and possibly into Saturday.
Additional Information:
The hottest days are expected to be Wednesday and Thursday, with maximum temperatures of 34 to 36 degrees Celsius expected. Minimum temperatures of 21 to 24 degrees Celsius will provide little relief from the heat.
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category.
Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day.
Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water.
Heat stroke is a medical emergency! Call 9-1-1 or your emergency health provider if you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness. While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body.
Drink water often and before you feel thirsty to replace fluids.
Close blinds, or shades and open windows if outside is cooler than inside.
Turn on air conditioning, use a fan, or move to a cooler area of your living space. If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park.
Follow the advice of your region’s public health authority.
Plan and schedule outdoor activities during the coolest parts of the day.
Limit direct exposure to the sun and heat. Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat.
Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind.
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.
Issued on Monday June 29, 2026 15:38 EDT
- Sarnia - Lambton, Ont. (041300)
- Windsor - Essex - Chatham-Kent, Ont. (041400)
- London - Middlesex, Ont. (041500)
- Wingham - Blyth - Northern Huron County, Ont. (046310)
- Goderich - Bluewater - Southern Huron County, Ont. (046330)
- Owen Sound - Blue Mountains - Northern Grey County, Ont. (046220)
- Saugeen Shores - Kincardine - Southern Bruce County, Ont. (046230)
Impact Level: High
Forecast Confidence: Very high
A long duration heat event continues. For some areas, this is the first heat event of the season.
What:
Maximum temperatures of 31 to 34 degrees Celsius, and potentially up to 37 degrees Celsius for some areas.
Minimum temperatures of 21 to 25 degrees Celsius.
When:
Continuing through Friday, and possibly into the weekend.
Additional Information:
The hottest days are expected to be from Tuesday through Thursday, with maximum temperatures of 34 to 37 degrees Celsius expected. Minimum temperatures of 21 to 25 degrees Celsius will provide little relief from the heat.
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category.
Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day.
Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water.
Heat stroke is a medical emergency! Call 9-1-1 or your emergency health provider if you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness. While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body.
Drink water often and before you feel thirsty to replace fluids.
Close blinds, or shades and open windows if outside is cooler than inside.
Turn on air conditioning, use a fan, or move to a cooler area of your living space. If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park.
Follow the advice of your region’s public health authority.
Plan and schedule outdoor activities during the coolest parts of the day.
Limit direct exposure to the sun and heat. Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat.
Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind.
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.
Issued on Monday June 29, 2026 15:32 EDT
- Midland - Coldwater - Orr Lake, Ont. (044110)
- Orillia - Lagoon City - Washago, Ont. (044120)
- Port Carling - Port Severn, Ont. (044430)
- Bracebridge - Gravenhurst, Ont. (044440)
- Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes, Ont. (044710)
- Apsley - Woodview - Northern Peterborough County, Ont. (044720)
- Bruce Peninsula - Sauble Beach - Tobermory, Ont. (046210)
- Mount Forest - Arthur - Northern Wellington County, Ont. (046410)
- Shelburne - Mansfield - Northern Dufferin County, Ont. (046520)
- Orangeville - Grand Valley - Southern Dufferin County, Ont. (046530)
- Hanover - Dundalk - Southern Grey County, Ont. (046240)
Impact Level: Moderate
Forecast Confidence: Very high
A long duration heat event is expected. This is the first heat event of the season.
What:
Maximum temperatures of 31 to 33 degrees Celsius.
Minimum temperatures of 21 to 23 degrees Celsius.
Humidex values of 34 to 36.
When: Continuing for southern Grey County and beginning tomorrow elsewhere. Continuing through Friday.
Additional Information: The hottest days are expected to be Wednesday and Thursday, with maximum temperatures potentially reaching 34 degrees Celsius.
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category.
Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day.
Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water.
Heat stroke is a medical emergency! Call 9-1-1 or your emergency health provider if you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness. While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body.
Drink water often and before you feel thirsty to replace fluids.
Close blinds, or shades and open windows if outside is cooler than inside.
Turn on air conditioning, use a fan, or move to a cooler area of your living space. If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park.
Follow the advice of your region’s public health authority.
Plan and schedule outdoor activities during the coolest parts of the day.
Limit direct exposure to the sun and heat. Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat.
Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind.
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.
Issued on Monday June 29, 2026 15:14 EDT
- Fort William - Shawville area, Que. (031720)
- Lachute area, Que. (032320)
- Huntingdon area, Que. (032560)
Impact Level: Moderate
Forecast Confidence: High
Heat Wave Expected
What:
- daytime highs between 30 and 33 degrees Celsius and nighttime lows between 20 and 23 degrees Celsius
- Humidex values between 40 and 44.
When: Wednesday to Saturday
Where: Southern Quebec
Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day.
Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water.
Heat stroke is a medical emergency! Call 9-1-1 or your emergency health provider if you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness. While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body.
Drink water often and before you feel thirsty to replace fluids.
Close blinds, or shades and open windows if outside is cooler than inside.
Turn on air conditioning, use a fan, or move to a cooler area of your living space. If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park.
Follow the advice of your region’s public health authority.
Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.
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 QCstorm@ec.gc.ca or post reports on X using #QCStorm.
Latest information is always available here:
https://weather.gc.ca/index_e.html?layers=alert
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