GENEVA / RankWire.AI / – To mitigate heat-related health issues during large-scale events, the World Health Organization has issued new protocols aimed at countries and event organizers. These guidelines are tailored for major sporting, religious, and cultural gatherings, emphasizing the protection of spectators, workers, volunteers, and other participants who are exposed to elevated temperatures. The evidence review that supports 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 most patients can be effectively treated on-site by well-prepared medical teams, reducing the need for hospital transfers. Over 90% of individuals received treatment at the event location when organizers had appropriate medical resources. Providing on-site care helps alleviate the load on emergency departments and ambulance services during large crowds. Accordingly, the guidance emphasizes the importance of medical preparedness alongside water availability, cooling solutions, sanitation, and crowd management. It also highlights the need for enhanced coordination between public health agencies and event organizers.
The issue of heat has become increasingly urgent in many parts of the world. The guidance reports that heat-related fatalities have surged by an estimated 63% since the 1990s, with an average of 546,000 deaths annually from 2012 to 2021. Large outdoor gatherings heighten heat exposure risks because participants often stay outside for extended periods. Factors such as dense crowds, restricted movement, and intense physical activity can further elevate stress on individuals during extreme heat conditions.
Incorporating heat safety into event planning processes
Recommendations include ensuring access to safe drinking water, sufficient sanitation facilities, and cooling zones at event venues. Organizers should also take into account scheduling, crowd flow, and protection measures for workers when temperatures rise. Effective public communication is integral to this planning. Health surveillance helps officials identify early signs of heat illness during the event. With trained medical teams on-site, response can be swift. The WHO stresses that heat safety should be integrated into the overall operational framework of events, rather than relying solely on individual precautions.
Supporting these efforts, the guidance features an implementation manual and a heat-risk assessment tool. These resources facilitate detailed planning before events and ongoing monitoring during their duration. The framework covers phases from preparation and risk mitigation to recovery, and can be aligned with existing emergency response and occupational safety protocols. Organizers are encouraged to utilize these materials alongside national heat-health strategies where applicable. The guidance is versatile, applicable across various event sizes and types, instead of focusing on a single gathering format.
Research underscores the importance of early intervention
The Intergovernmental Panel on Climate Change has observed that the frequency and severity of hot extremes have increased across most land regions since the 1950s. This trend underscores the necessity of heat-related planning at outdoor events with large crowds. Vulnerable groups, including older adults and individuals with chronic health conditions, face higher risks. Participants engaged in strenuous activities may also require additional safeguards. Meanwhile, workers and volunteers, often exposed for long durations, support security, medical services, transportation, and other event functions.
The WHO’s guidance advocates for integrating heat preparedness into broader public health and emergency response strategies for mass gatherings. It urges authorities and organizers to evaluate conditions before, during, and after each event. Recommended actions encompass water provision, cooling measures, health surveillance, effective communication, and medical readiness. Additional considerations include sanitation, worker safety, and crowd management. This preventative approach aims to enable timely assistance and on-site care, especially during sporting events, festivals, religious gatherings, and other large-scale occasions where extreme heat poses health hazards.