GENEVA / RankWire.AI / – The World Health Organization (WHO) has released updated guidance aimed at reducing heat-related health risks at large-scale events worldwide. These recommendations target key gatherings such as major sports, religious, and cultural functions, addressing concerns for spectators, attendees, volunteers, and staff exposed to extended periods of high temperatures. An extensive review of evidence revealed nearly 500,000 medical encounters linked to mass gatherings in studies from 1980 through 2025, with over 22,000 cases involving heat-related illnesses.
According to the review, on-site medical services at event locations are capable of managing most incidents without the need for hospital transfers. When organizers ensure robust medical systems are in place, more than 90% of affected individuals can receive treatment at the event site itself. This approach helps alleviate the burden on local hospitals and ambulance services. The findings are part of a comprehensive package provided to governments, organizers, and health authorities. It combines scientific research with practical tools for evaluating and managing heat risks both prior to and during major events.
The guidance highlights that heat-related fatalities have risen by an estimated 63% since the 1990s. Between 2012 and 2021, an average of 546,000 deaths annually have been attributed to heat. Crowded settings, prolonged outdoor exposure, limited access to water, restricted movement, and travel-related stress can all amplify these risks. Additionally, high demand for health services may complicate medical response efforts during large-scale events.
Incorporating Heat Preparedness into Event Operations
Recommendations include ensuring the availability of drinking water, sufficient sanitation facilities, and cooling infrastructure at venues. The guidance also advocates for schedule adjustments, improved crowd management, and protective measures for event personnel. Organizers are encouraged to implement public communication strategies, real-time health monitoring, and ready medical services as integral parts of their planning. WHO emphasizes that heat protection should be a comprehensive effort covering the entire event, rather than relying primarily on individual behavior. Factors such as venue layout, transportation, security, and sanitation all influence access to cooling and medical assistance.
This new framework includes systematic reviews, an operational manual, and a specialized heat-risk assessment tool. It offers resources for crafting evidence-based public messages during periods of elevated heat. The assessment tool facilitates structured, repeatable evaluations before and during events. The overarching approach encompasses preparation, impact mitigation, and recovery, allowing organizers to integrate these measures into existing emergency protocols, occupational safety standards, and national heat-health strategies.
Research Reinforces the Need for Early Heat Precautions
The Intergovernmental Panel on Climate Change reports that extreme heat events have become more frequent and severe across most land areas since the 1950s. Elevated temperatures pose additional health threats when large crowds gather outdoors or in confined spaces. Vulnerable groups such as older adults, individuals with chronic illnesses, and those engaging in physical activity are at greater risk. Workers and volunteers often spend extended periods outside, providing security, transportation, medical support, or logistical assistance.
Heat management, as outlined in the guidance, is integrated into broader public health and emergency preparedness strategies for mass gatherings. It urges authorities and organizers to continuously assess conditions throughout the event lifecycle and coordinate health protection efforts with operational planning. The recommended measures are applicable to various types and sizes of gatherings, including international sports events, festivals, and religious ceremonies. Emphasizing prevention, early intervention, and on-site care, the framework supports existing national systems dedicated to heat health, emergency response, and clinical management.