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Severe Weather Alerts Map
Live severe weather warnings: heat, cold, winter storms, high wind, dense fog and more, from the National Weather Service, Environment Canada and other agencies, with radar and local forecasts.
Where this data comes from
- National Weather Service alerts
- Environment and Climate Change Canada
- Open-Meteo forecasts
- RainViewer radar
Official alerts are shown exactly as issued and graded SEV-1 (extreme) to SEV-4 (minor). Each event shows its sources, how many independent feeds confirm it, and when it was received. About our data.
Frequently asked questions
Can I get weather alerts for my location?
Yes. Turn on your location and Zero Containment shows the official alerts in force for your exact point, plus a sound and desktop alert option.
Is there a weather forecast too?
Yes. Every place has current conditions, hourly and 10-day forecasts, wind, UV, air quality, and surf and tides on the coast.
Stay safe
Read the extreme heat and cold safety guide, and keep the emergency number for where you are.
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