Grimmer Weather Warnings

yellow warning - severe thunderstorm - in effect At 9:39 a.m. EDT, Environment Canada meteorologists are tracking an area of severe thunderstorms capable of producing strong wind gusts, up to quarter size hail and very heavy rain. Thunderstorm Location: Chiswick to Mattawa Motion: Moving southeast at 40 km/h Hazards: Wind: strong (up to 90 km/h) Hail: up to quarter size (up to 2.5 cm) Rain: very heavy (50 - 100 mm) Locations in the Path: Chiswick, Kiosk, Lake Travers, Algonquin Provincial Park ### Local utility outages are likely. Heavy rain may cause flash flooding and significant reductions to visibility. Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain. Take immediate cover if a thunderstorm approaches. If outside, protect yourself from flying debris and hail. Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches.

Environment Canada

yellow warning - heat - in effect The first heat event of the season continues. What: Maximum temperatures of 28 to 32 degrees Celsius. Minimum temperatures of 17 to 21 degrees Celsius. Humidex values of 35 to 40. When: Continuing through Thursday, and possibly into Friday. Additional Information: Heat and humidity will increase further beginning today, with maximum temperatures of 29 to 32 degrees Celsius and humidex values of 36 to 40. Minimum temperatures of 18 to 22 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. ### 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 [email protected] or post reports on X using #ONStorm. 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.

Environment Canada

yellow watch - severe thunderstorm - in effect This afternoon and evening, conditions will be favourable for the development of severe thunderstorms capable of producing strong wind gusts, large hail and heavy rain. There is also a risk of a tornado. Nautical activities may be hazardous due to sudden, severe wind gusts over bodies of water. ### Local utility outages are possible. Damage to roofs, fences, branches or soft shelters is possible. Large hail can cause significant damage and injury. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or post reports on X using #QCStorm. When thunder roars, go indoors! Lightning kills and injures Canadians every year.

Environment Canada

yellow warning - heat - in effect Heat wave expected. What: - Daytime highs between 29 and 33 degrees Celsius and overnight lows between 18 and 23 degrees Celsius. - Humidex values between 40 and 44. When: Wednesday to Saturday ### 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 [email protected] or post reports on X using #QCStorm. 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.

Environment Canada