11:01 PM ADT Tuesday 4 August 2026
Impact Level: Moderate
Forecast Confidence: High
Locations: southern and eastern New Brunswick.
Time span: beginning Wednesday afternoon and persisting into Friday, possibly into the weekend for some counties.
Maximum temperatures: near 33 degrees Celsius (Humidex 36 to 39).
Minimum temperatures: 15 to 18 degrees Celsius.
Remarks: A hot and humid air mass is expected to move into the region on Wednesday, along with elevated humidex values. Nighttime lows are also forecast to stay warm for eastern areas of the province, providing little to no relief. Temperatures and humidex values are expected to be lower by Saturday, however some counties may see warning level conditions persist.
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.
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:
How to protect yourself from the health effects of extreme heat
Health risks and who is at risk of extreme heat events
Environment Canada issues heat warnings when the forecast temperatures indicate the potential for significant impact across various sectors.
The Government of New Brunswick, in collaboration with Environment Canada, uses Heat Alert and Response System alert levels to indicate how forecast high temperatures and/or humidex, along with duration, present an increased risk to public health.
Information on how to prevent heat-related illness and details about the Government of New Brunswick Heat Alert and Response System at Heat Alert and Response System - GNB.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or post reports on social media using #NBStorm.
In effect for:
Fredericton and Southern York County
10:58 PM ADT Tuesday 4 August 2026
Impact Level: Moderate
Forecast Confidence: High
Locations: mainland Nova Scotia.
Time span: beginning Wednesday afternoon and persisting into Friday, possibly into the weekend for some counties.
Maximum temperatures: near 32 degrees Celsius (Humidex 38).
Minimum temperatures: near 18 degrees Celsius.
Remarks: A hot and humid air mass is expected to move into the region Wednesday afternoon, bringing a period of persistently high daytime temperatures and elevated Humidex values. Nighttime lows are also forecast to stay warm, providing little to no relief. Conditions should improve for some areas over the weekend, however some counties may see warning level temperatures and or Humidex persist.
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.
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:
How to protect yourself from the health effects of extreme heat
Health risks and who is at risk of extreme heat events
Information is provided on the Nova Scotia Department of Health and Wellness website at novascotia.ca/heat-related-illness/.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NSstorm@ec.gc.ca or post reports on social media using #NSStorm.
Issued by Environment Canada and the Nova Scotia Department of Health and Wellness
In effect for:
Halifax Metro and Halifax County West
10:56 PM ADT Tuesday 4 August 2026
Impact Level: Moderate
Forecast Confidence: High
Locations: P.E.I.
Time span: beginning Wednesday afternoon and persisting into Friday.
Maximum temperatures: near 30 degrees Celsius (Humidex 36).
Minimum temperatures: near 18 degrees Celsius.
Remarks: A very warm and humid air mass is expected to move into the region Wednesday afternoon bringing a period of high daytime temperatures and elevated Humidex values. Nighttime lows are also forecast to stay warm, providing little to no relief. Conditions are expected to improve over the weekend.
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.
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:
How to protect yourself from the health effects of extreme heat
Health risks and who is at risk of extreme heat events
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to PEstorm@ec.gc.ca or post reports on social media using #PEStorm.
In effect for:
Queens County P.E.I.
