WHO and WMO release ‘Heatwaves and health: guidance on warning-system development’ (1 July 2015)

The World Health Organization (WHO) and World Meteorological Organization (WMO) jointly released a document entitled ‘Heatwaves and health: guidance on warning-system development’ on 1 July 2015.

Background Information:

Heat or hot weather lasting several days is often termed a ‘heatwave’.

There is no universally accepted definition of a heatwave, but it has the following attributes:

  • they are periods of unusually hot & dry/ hot & humid weather
  • they have subtle onset and cessation
  • they last at least 2-3 days; and
  • they have a discernible impact on human activities

Contents of the Document:

  1. Executive Summary
  2. Introduction
  3. Heat and Health
  4. Assessment of Heat Stress
  5. Heat-Health Warning Systems-Definition and Methodology
  6. Communicating Heat–Health Warnings and Heat-Related Information to Stakeholders and the Public
  7. Intervention Strategies
  8. Evaluation of Health Warnings and Health-Protection Measures
  9. Planning for Heat Events at the Intra-Seasonal to Seasonal Scale
  10. Longer-Term Initiatives for Managing Heatwaves and Health

Useful Links:

Link to the Document:


Link to the related Web Page:



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