At a Glance
- Alert level: Red – Take Immediate Action.1
- Purpose: Indicates that dangerous or life-threatening weather conditions are occurring or are expected to occur soon, requiring immediate action to protect yourself and others.2
- Issued by: Environment and Climate Change Canada (ECCC) through the Meteorological Service of Canada (MSC).3 4
- What it means: There is a high risk of serious impacts to life, property, infrastructure, or travel from severe weather.5
- Common hazards: Tornadoes, hurricanes, extreme heat, severe thunderstorms, blizzards, winter storms, flash flooding, freezing rain, and other high-impact weather events.6
- Recommended action: Follow instructions from weather authorities and local emergency officials immediately, avoid unnecessary travel, and be prepared to take protective action.7
- Related: Yellow Weather Warning, Orange Weather Warning, Weather Warnings, Weather Watches, Weather Advisories, and Special Weather Statements.
What Is a Red Weather Warning?
A Red Weather Warning represents the highest level of weather alert, indicating that dangerous or life-threatening weather conditions are occurring or are expected within a short period of time. A red warning signals that severe weather poses an immediate risk to people, property, infrastructure, or transportation, and that protective action should be taken without delay.8
Unlike weather alerts that encourage people to remain aware or prepare for worsening conditions, a red warning means the threat has become serious enough that immediate action is required. Depending on the type of weather event, this may include staying indoors, avoiding unnecessary travel, seeking shelter, following evacuation orders, or monitoring emergency information from local authorities.
A Red Weather Warning does not refer to one specific type of weather. It can be issued for any weather event capable of causing life-threatening impacts, including blizzards, tornadoes, hurricanes, severe thunderstorms, flash flooding, freezing rain, or extreme heat.
Some of Canada’s most destructive weather disasters demonstrate the type of impacts associated with a Red Weather Warning. Examples include the 1998 Ice Storm, the 1977 Southern Ontario Blizzard, and the December 2022 North American winter storm, all of which caused widespread travel disruptions, prolonged power outages, infrastructure damage, and dangerous conditions. While these events occurred under different warning systems, they illustrate the level of severity that a red warning is intended to communicate.
When Is a Red Weather Warning Issued?
A Red Weather Warning is issued when meteorologists determine that a weather event is expected to have life-threatening impacts and there is a high level of confidence in the forecast. Using weather models, radar, satellite imagery, and real-time observations, Environment and Climate Change Canada assesses the severity, timing, and potential impacts of an event before issuing the highest level of alert. Red warnings are reserved for the most dangerous situations, where immediate action is needed to protect lives and minimize the effects of severe weather on people, property, and critical infrastructure. 9 10
What Should You Do During a Red Weather Warning?
When a Red Weather Warning is issued, take immediate action to protect yourself and those around you. Stay indoors or seek appropriate shelter, avoid unnecessary travel, and follow instructions from Environment and Climate Change Canada and local emergency officials. Keep your phone charged, have an emergency kit ready, and monitor official weather updates for changing conditions, evacuation orders, road closures, or power outages. Do not assume conditions are safe until the warning has been lifted.
Red vs Yellow Weather Warning
A Yellow Weather Warning advises you to be aware of potentially hazardous weather, while a Red Weather Warning means life-threatening conditions are expected or already occurring and immediate action is required.
| Yellow Weather Warning | Red Weather Warning |
|---|---|
| Be aware of potentially hazardous weather. | Take immediate action to protect yourself. |
| Weather may disrupt some activities. | Weather poses a serious threat to life and property. |
| Stay informed and plan ahead. | Follow emergency instructions without delay. |
| Most daily activities can continue with caution. | Normal activities may become dangerous or impossible. |
| Monitor forecasts for updates. | Seek shelter and avoid unnecessary travel. |
A Yellow Weather Warning is intended to increase awareness and encourage people to prepare for changing conditions. A Red Weather Warning indicates that the risk has escalated to the highest level, requiring immediate action to reduce the risk of injury or loss of life.
Red vs Orange Weather Warning
Both Orange and Red Weather Warnings indicate dangerous weather, but a Red Weather Warning represents a greater threat and calls for immediate protective action.
| Orange Weather Warning | Red Weather Warning |
|---|---|
| Dangerous weather is expected or occurring. | Exceptionally dangerous or life-threatening weather is expected or occurring. |
| Significant impacts and disruptions are possible. | Widespread, severe, or prolonged impacts are expected. |
| Prepare, adjust plans, and closely monitor conditions. | Take immediate protective action. |
| Travel may become hazardous. | Travel should be avoided unless absolutely necessary. |
| Be ready for conditions to worsen. | Act immediately to protect yourself and others. |
An Orange Weather Warning signals that severe weather could have significant impacts and that you should prepare. A Red Weather Warning means the danger has reached the highest level and immediate action is needed to protect lives and property.
Frequently Asked Questions About Red Weather Warnings
A red weather warning means extreme weather is likely to create very dangerous conditions and significant, widespread impacts. People in affected areas should take immediate action to protect themselves and others.
Red is the highest and most serious level in Canada’s three-colour weather alert system.
Yes. A red weather warning indicates the potential for very dangerous conditions and significant, widespread impacts.
Driving may be extremely dangerous or impossible depending on the hazard and local conditions. Avoid unnecessary travel and follow official guidance.
Travel may be severely disrupted or unsafe. Flights, roads, public transportation and rail services may experience delays, cancellations or closures.
Staying home or in another safe location may be appropriate depending on the specific hazard and instructions from local authorities.
There is no standard duration. A red weather warning may remain in effect for several hours or multiple days depending on the event and expected impacts.
Yes. A red alert can be downgraded to orange or yellow if the expected impacts become less severe.
Weather alerts are issued through Environment and Climate Change Canada and the Meteorological Service of Canada.
Sources
- https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.html ↩︎
- https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts.html ↩︎
- https://www.canada.ca/en/environment-climate-change.html ↩︎
- https://weather.gc.ca/ ↩︎
- https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/weather-impact-guides.html ↩︎
- https://www.canada.ca/en/services/policing/emergencies/preparedness/get-prepared/hazards-emergencies/weather.html ↩︎
- https://www.canada.ca/en/services/policing/emergencies/preparedness/get-prepared.html ↩︎
- https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.html ↩︎
- https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/weather-impact-guides.html ↩︎
- https://www.canada.ca/en/environment-climate-change.html ↩︎
