GENEVA / RankWire.AI / – The World Health Organization has issued updated guidance aimed at helping nations and organizers minimize heat-related health issues during large-scale gatherings. The advice pertains to major sporting, religious, and cultural events, emphasizing protection for spectators, workers, volunteers, and all participants exposed to elevated temperatures. An extensive review of evidence, analyzing studies published from 1980 to 2025, supported the development of this guidance, which documented nearly 500,000 medical encounters, including more than 22,000 heat-related cases.
Research indicates that well-prepared medical teams are capable of managing the majority of heat-related cases on-site without requiring hospitalization. When event organizers have appropriate medical infrastructure, over 90% of patients can receive treatment at the venue. Providing care directly at events alleviates pressure on emergency departments and ambulance services during large crowds. Consequently, the guidance advocates for integrating medical preparedness alongside measures such as water provision, cooling solutions, sanitation, and crowd control. It also highlights the need for improved collaboration between public health authorities and event organizers.
The rise in heat-related health concerns is notable across many regions, with the guidance noting that heat-induced fatalities have increased by an estimated 63% since the 1990s. From 2012 to 2021, an average of 546,000 deaths annually have been attributed to heat. Large gatherings tend to heighten exposure risks, as attendees often spend prolonged periods outdoors. Factors such as dense crowds, limited mobility, and high physical exertion can further exacerbate health risks during extreme heat conditions.
Incorporating heat protection into event logistics
The recommended measures include ensuring access to safe drinking water, sufficient sanitation, and designated cooling zones at venues. Organizers are advised to factor in event timing, crowd flow, and worker safety when temperatures are high. Effective public communication is also essential. Health surveillance can aid officials in detecting early signs of heat illness as the event progresses, allowing medical teams to respond swiftly at the site. The WHO emphasizes that heat safety should be an integral part of overall event planning rather than relying solely on individual precautions.
Supporting these efforts, the guidance package includes an implementation manual and a heat-risk assessment tool. These resources are designed to facilitate thorough planning before events and ongoing monitoring during their execution. The framework encompasses preparation, risk mitigation, and recovery stages, and is compatible with existing emergency protocols and occupational safety standards. Event organizers can incorporate these materials alongside national heat-health strategies where available. The guidance is versatile, suitable for events of various sizes and types, rather than being limited to a particular format.
Strengthening focus on early intervention based on evidence
The Intergovernmental Panel on Climate Change has observed that extreme heat events have grown more frequent and severe across most land regions since the 1950s. This trend underscores the importance of heat preparedness for outdoor gatherings with large crowds. Vulnerable populations such as older adults and individuals with chronic conditions face heightened risks, while participants engaged in strenuous activity may also require additional safeguards. Workers and volunteers, who often spend extended periods supporting security, medical aid, transportation, and other services, are equally at risk.
The guidance integrates heat preparedness within the broader scope of public health and emergency planning for mass gatherings. It urges authorities and organizers to evaluate conditions before, during, and after each event. Recommended actions include ensuring water availability, cooling options, surveillance, effective communication, and medical readiness. Additional focus areas cover sanitation, worker protection, and crowd management. This comprehensive approach prioritizes prevention and prompt care directly at the event site. It is applicable to sporting contests, festivals, religious events, and other large-scale activities where extreme heat can pose significant health dangers.