WHO gives event organizers a heat-risk planning tool

On September 30, WHO released a new package for managing heat at large gatherings, including a downloadable risk-assessment spreadsheet, implementation guidance and three systematic reviews. It is intended for the authorities and organizers responsible for spectators, pilgrims, workers and volunteers at sporting, religious and cultural events.

The implementation manual treats heat as an operational responsibility that connects venue design, crowd movement, transport, communications and health services. Advice to attendees works within those conditions: a person needs somewhere accessible to cool down and a practical route to drinking water or medical help. The package brings those decisions into preparation, the event itself and the review afterwards.

The evidence supports taking preparedness seriously while leaving important questions open. The review report covers 54 studies across three themes, but much of the underlying research is observational and unevenly reported. Its review of cooling and medical arrangements combines very different events and populations, with much of the patient data coming from the Hajj. These records cannot establish one universal reduction in illness from adopting the new package.

For organizers, the concrete resource is the risk-assessment tool, available as an Excel workbook. WHO describes it as a repeatable way to assess risks before and during an event. It is planning support to use with local health authorities, existing emergency arrangements and professional judgment.