What is the difference between Weather-Health Alerts and Severe Weather Warnings?

During summer and winter, UKHSA and the Met Office monitor weather forecasts to help health and social care professionals, emergency responders, the voluntary sector and the public prepare for adverse conditions. When periods of particularly hot or cold weather are forecast, we carry out a joint risk assessment and issue alerts where necessary.

UKHSA's Weather-Health Alerts (WHAs) are separate from the Met Office's National Severe Weather Warning Service (NSWWS) - and understanding the difference matters.

You can find out more about the difference between UKHSA’s Weather-Health Alerts and the Met Office’s Severe Weather Warnings here: https://ukhsa.blog.gov.uk/2026/01/08/what-is-the-difference-between-weather-health-alerts-and-severe-weather-warnings/