GENEVA / RankWire.AI / – World Health Organization has issued fresh recommendations aimed at helping nations and event organizers minimize heat-related health issues during mass gatherings. These guidelines specifically address major sporting, religious, and cultural occasions. Their focus is on safeguarding attendees, staff, volunteers, and other participants who are exposed to elevated temperatures. An evidence review supporting these recommendations analyzed studies published from 1980 to 2025, documenting nearly 500,000 medical encounters, including over 22,000 heat-related cases.
Data indicates that adequately prepared medical teams can treat most patients on-site, avoiding hospital transfers. Over 90% of individuals received treatment directly at event locations when organizers had sufficient medical infrastructure. Providing on-site care alleviates the burden on emergency departments and ambulance services during large crowds. Consequently, the guidance emphasizes medical preparedness alongside access to water, cooling facilities, sanitation, and crowd control. It also urges enhanced cooperation between public health authorities and event organizers.
Heat has increasingly emerged as a significant health threat in various regions. The guidance highlights that heat-related fatalities have grown by an estimated 63% since the 1990s. It also notes an average of 546,000 annual heat-related deaths between 2012 and 2021. Large gatherings can heighten exposure risks, as individuals tend to stay outdoors for prolonged periods. Dense crowds, restricted movement, and vigorous activities further intensify heat stress during extreme weather conditions.
Incorporate heat safety into event planning
The recommendations advocate for the provision of safe drinking water, proper sanitation, and cooling zones at venues. Event organizers should also factor in scheduling, movement patterns of crowds, and protection measures for workers during high-temperature periods. Effective public communication is a crucial component of the planning process. Health surveillance systems can assist officials in detecting signs of heat illness as events unfold. Well-trained medical teams can then respond promptly at the site. The World Health Organization emphasizes that heat safety measures should be integrated into comprehensive event management strategies rather than relying solely on individual precautions.
This new guidance package includes an implementation manual and a heat-risk assessment tool, designed to facilitate detailed planning prior to events and ongoing monitoring during their duration. The framework encompasses preparation, risk mitigation, and recovery phases, and can be aligned with existing emergency response and occupational safety protocols. Organizers are encouraged to use these materials alongside national heat-health plans where such systems are in place. The guidance applies broadly across different types and sizes of events, rather than focusing on a specific gathering format.
Strengthening early prevention through evidence-based strategies
The Intergovernmental Panel on Climate Change has identified that the frequency and severity of hot extremes have increased across most land regions since the 1950s. This trend underscores the need for thorough heat preparedness at outdoor events with large crowds. Older adults and individuals with chronic health issues face greater risks from heat exposure. Participants engaged in strenuous activities may also require additional protection. Support personnel and volunteers often remain exposed for long durations while managing security, medical services, transportation, and other logistical functions.
The guidance emphasizes embedding heat preparedness into the broader framework of public health and emergency planning for mass gatherings. It recommends that authorities and organizers evaluate conditions before, during, and after each event. Key measures include ensuring water availability, cooling options, surveillance, effective communication, and medical readiness. Additional focus areas are sanitation, worker protection, and crowd control. The overall approach prioritizes prevention and immediate care on-site. It targets sporting events, festivals, religious gatherings, and other large-scale occasions where high temperatures pose health hazards.