What is Canada’s new colour-coded alert system and how it will ensure public safety during extreme weather

In a significant update to its public weather program, Environment and Climate Change Canada (ECCC) introduced a new colour-coded weather alert system on November 26, 2025, designed to make it easier for Canadians to understand the severity of extreme weather events and the associated risks at a glance.

This new system aligns with best international practices advocated by the World Meteorological Organization and builds upon changes already adopted by several European countries. The initiative is part of ongoing modernization efforts to deliver clearer, more precise, and impact-focused weather information to the public.

New colour-coded alert system

Weather alerts will now feature one of three colours, yellow, orange, or red, reflecting the seriousness and potential impact of weather events, providing Canadians with a quick risk assessment to inform decision-making and preparedness.

• Yellow Alerts (Most Common): Indicate hazardous weather that may cause moderate, localized, and short-term damage or disruption, including travel delays or minor power outages. Examples include snowfall warnings causing localized road disruptions or wind warnings signaling broken branches and short outages.
• Orange Alerts: Signal severe weather likely to cause significant and widespread impact which may last a few days, such as major snowfall leading to travel shutdowns or powerful winds causing structural damage and widespread power outages.
• Red Alerts (Rare): Warn of very dangerous, possibly life-threatening weather events expected to cause extreme, extensive, and prolonged damage or disruption. Historical examples include the 1998 ice storm in Ontario and Quebec and the 2021 atmospheric river flooding in British Columbia. Red wind alerts indicate structural damage to trees and homes and long-duration outages.

Meteorologists use a new Alert Colour Matrix combining advanced atmospheric data, such as weather models, real-time observations, and forecast confidence, with Impact Guides to estimate the event’s potential consequences on people, property, and communities.

This approach moves from solely forecasting weather phenomena to explaining the anticipated impacts, aiming to enhance public understanding and response effectiveness.

Julie Dabrusin, Minister of Environment and Climate Change, emphasized the importance of clear communication amidst increasingly frequent extreme weather due to climate change. She stated, “By improving how severe weather is reported, we are helping Canadians better understand and prepare for potential impacts, so they can make informed decisions about how and when to protect themselves, their loved ones, and their property.”

Eleanor Olszewski, Minister of Emergency Management and Community Resilience, also noted, “Timely, reliable alerts coupled with the knowledge to act are critical as hurricanes, wildfires, floods, and other climate emergencies become more common.”

FAQs

How is this system different from the previous one?
The system introduces colour coding that quickly conveys the risk level, replacing prior plain textual alerts. It integrates expected impact alongside forecast certainty to provide context rather than just weather conditions.

What types of weather does it cover?
All hazardous weather events, including thunderstorms, wind, rain, snow, blowing snow, heat, and mixed hazards, can trigger colour-coded alerts. Simultaneous events are prioritized by severity colour.

How can Canadians access these alerts?
Through Environment Canada’s official website (Canada.ca/Weather) and the WeatherCAN mobile app, which is free on Android and iOS platforms.

Have other countries adopted similar systems?
Yes, over 31 meteorological agencies in Europe have implemented similar risk-based, colour-coded alerts as recommended by the World Meteorological Organization.