GENEVA / RankWire.AI / – The World Health Organization has issued updated recommendations aimed at helping nations and event organizers minimize heat-related health issues during mass gatherings. These guidelines address major events including sports, religious, and cultural gatherings. Their primary focus is on safeguarding spectators, staff, volunteers, and all participants who are exposed to elevated temperatures. The evidence review informing these guidelines analyzed research published from 1980 to 2025, encompassing nearly 500,000 medical encounters. Among these, over 22,000 cases were directly linked to heat.
The data indicate that with proper medical preparation, most individuals can be treated on-site without requiring hospital transfer. When event organizers ensure robust medical services, over 90% of patients receive care at the venue itself. Providing treatment at the event location helps alleviate the burden on emergency departments and ambulance services during large crowds. Consequently, the guidance emphasizes the importance of medical readiness alongside other critical measures such as access to water, cooling, sanitation, and crowd management. It also advocates for enhanced cooperation between public health teams and event organizers.
Heat-related health issues are increasingly a concern in many parts of the world. The guidance highlights that deaths caused by heat have risen by an estimated 63% since the 1990s. On average, there are about 546,000 heat-related fatalities each year from 2012 to 2021. Large gatherings often heighten exposure risk because attendees tend to stay outdoors for extended durations. Additionally, dense crowds, restricted movement, and intense physical activity can amplify the strain during periods of extreme heat.
Incorporating heat safety measures into event planning becomes essential
The recommendations emphasize the need for accessible drinking water, sufficient sanitation facilities, and cooling stations at event sites. Organizers should also account for factors such as event timing, crowd flow, and protections for workers when temperatures climb. Effective public communication is another vital element of planning. Health surveillance can enable officials to detect early signs of heat illness as the event progresses. Well-prepared medical teams can then respond promptly at the venue. The WHO states that heat safety should be integrated into overall event operations rather than relying solely on individual precautions.
The package also provides an implementation manual and a heat-risk assessment tool designed to facilitate thorough planning before events and continuous monitoring during the gatherings. These resources cover planning, risk mitigation, and recovery strategies. They are meant to complement existing emergency protocols and occupational safety procedures. Organizers can align these materials with national heat-health plans where applicable. The guidelines are intended for various event types and sizes, rather than targeting a specific gathering format.
Scientific evidence underscores the need for early preventive action
The Intergovernmental Panel on Climate Change has observed that extreme heat events are becoming more frequent and severe across most land regions since the 1950s. This increasing trend makes heat preparedness at outdoor gatherings even more critical. Vulnerable groups such as older adults and individuals with chronic health conditions face heightened risks. Participants engaging in strenuous activities may also require additional safeguards. Workers and volunteers, supporting security, medical services, transportation, and other event functions, can be exposed for long periods.
The guidelines place heat preparedness within the broader framework of public health and emergency response planning for large events. They recommend that authorities and organizers evaluate conditions before, during, and after each gathering. Key measures include ensuring water availability, cooling options, health surveillance, effective communication, and medical readiness. Additional focus areas are sanitation, worker safety, and crowd management. The overall approach emphasizes prevention and rapid response directly at the event site. It is suitable for sporting contests, festivals, religious ceremonies, and other large-scale events where high temperatures pose health threats.