GENEVA / RankWire.AI / – The World Health Organization (WHO) has released new recommendations aimed at decreasing heat-related health issues during mass gatherings around the globe. These guidelines target prominent sporting, religious, and cultural occasions. They specifically address hazards faced by spectators, participants, volunteers, and staff subjected to extended periods of high temperatures. An updated review of evidence revealed nearly half a million medical visits linked to mass gatherings documented in studies from 1980 through 2025, with over 22,000 cases involving heat-related conditions.
Findings indicate that well-organized on-site medical services can manage most incidents without requiring hospital transfers. When event organizers implement comprehensive medical setups at the venue, more than 90% of patients can be treated locally. This strategy alleviates the burden on nearby hospitals and ambulance networks. These insights form part of a comprehensive toolkit designed for governments, organizers, and health authorities, blending research data with practical methods for evaluating and handling heat risks both before and during major events.
Since the 1990s, heat-related fatalities have surged by an estimated 63%, the guidance states. Between 2012 and 2021, an average of 546,000 deaths annually were attributed to heat. Overcrowded environments can amplify exposure when individuals remain outdoors in extreme heat for long durations. Additional risks include limited access to water, restricted movement, and stress from travel. The high demand on health services can further complicate emergency responses during large-scale gatherings.
Embedding heat preparedness into event operations
The guidelines advocate providing accessible drinking water, sufficient sanitation facilities, and cooling systems at event sites. They also recommend modifying schedules, managing crowd movement more effectively, and implementing protective measures for staff working at the events. Organizers should incorporate public messaging, real-time health monitoring, and ready medical services into their planning processes. WHO emphasizes that heat protection should be integrated throughout the event rather than relying mainly on individual actions. Elements like venue design, transportation, security, and sanitation are crucial in ensuring access to cooling and medical assistance.
This new resource bundle features systematic reviews, an implementation guide, and a specialized heat-risk assessment instrument. It also supplies materials to craft evidence-based public messages during hot weather episodes. The assessment tool facilitates structured, repeatable reviews both prior to and during events. The overall framework encompasses planning, impact mitigation, and post-event recovery. Organizers are encouraged to integrate these measures with existing emergency protocols, occupational safety standards, and national heat-health action plans.
Research underlines the importance of early heat precautions
The Intergovernmental Panel on Climate Change reports that extreme heat events have become more frequent and intense across most land regions since the 1950s. As temperatures rise, health risks increase when large crowds gather outdoors or in confined spaces. Vulnerable groups such as older adults, individuals with chronic illnesses, and those engaged in physical activities face heightened danger. Workers and volunteers who spend prolonged hours outdoors providing security, transportation, or medical support are also at increased risk.
The guidance frames heat management as an integral part of broader public health and emergency preparedness efforts for mass gatherings. It urges authorities and organizers to continuously assess conditions throughout the event lifecycle and coordinate health protection measures with operational planning. The recommendations apply across various event types and sizes, including international sports competitions, festivals, and religious assemblies. The focus remains on prevention, early intervention, and on-site care, complementing existing national systems for heat health, emergency response, and clinical management.