Cold health alert for London

Advice and Information - 20 November 2025

The UK Health Security Agency (UKHSA) has issued a yellow cold health alert for London. The alert is in effect from 17 November 2025 at 12:00pm to 22 November 2025 at 08:00am.
A woman keeping warm by holding a mug containing a hot drink and being wrapped in a blanket

The yellow cold health alert for London valid is from 17 November 2025 at 12:00pm to 22 November 2025 at 08:00am.  It is to be noted that the yellow alert has a matrix score of 9. This means there are potential impacts across health and social care services.

Risk matrix

Image
An infographic of the Risk Matrix used in weather alerts

Potential impacts

There is potential for significant impacts across health and social care services, including:

  • A rise in deaths, particularly among those aged 65 and over or with health conditions. We may also see impacts on younger age groups
  • A likely increase in demand for health services
  • Impacts on the workforce affecting delivery of services
  • Challenges keeping indoor temperatures at the recommended 18°C leading to more risk to vulnerable people

Protecting yourself during this cold health alert

See advice on how to stay warm and well during cold weather:

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