GENEVA / RankWire.AI / – The World Health Organization (WHO) has unveiled updated recommendations aimed at minimizing heat-related health issues at large-scale events around the globe. These guidelines are intended for major sporting, religious, and cultural gatherings, addressing hazards faced by spectators, attendees, volunteers, and staff exposed to extended periods of high temperatures. An extensive review of evidence showed nearly 500,000 medical visits at mass gatherings documented in studies from 1980 through 2025, with over 22,000 cases linked to heat illnesses.
According to the review, well-organized on-site medical services can effectively manage the majority of heat-related cases without requiring hospital transfers. When event organizers implement comprehensive medical systems at the venue, more than 90% of patients receive treatment on-site. This strategy can alleviate burdens on local hospitals and ambulance services. These findings are part of a broader package of resources for governments, organizers, and health agencies, combining research insights with practical tools for evaluating and mitigating heat risks before and during major events.
Since the 1990s, heat-related fatalities have surged by an estimated 63%, the guidance states. On average, about 546,000 deaths annually occurred from heat between 2012 and 2021. Crowded conditions can heighten exposure, especially when individuals remain outdoors for long durations in elevated temperatures. Additional hazards include limited access to water, restricted movement, and stress from travel. The high demand on health services may also pose challenges for medical responses during large-scale events.
Incorporating Heat Preparedness into Event Operations
The WHO recommends ensuring the availability of drinking water, sufficient sanitation facilities, and cooling options at venues. It also emphasizes the importance of adjusting event schedules, managing crowd flow efficiently, and implementing protective measures for staff. Organizers are advised to incorporate public communication strategies, real-time health monitoring, and ready medical services into their planning processes. WHO stresses that heat protection should be integrated throughout the event, not solely reliant on individual actions. Venue design, transportation, security, and sanitation all influence access to cooling and medical aid.
The comprehensive package includes systematic reviews, an implementation manual, and a dedicated tool for assessing heat risk. Additionally, it supplies resources for crafting evidence-based public messaging during periods of heightened heat. The assessment tool facilitates structured, repeatable evaluations before and during events. The broader framework encompasses preparation, impact mitigation, and recovery phases. Organizers can align these measures with existing emergency protocols, occupational safety standards, and national heat-health plans.
Research Reinforces the Need for Early Heat Precautions
The Intergovernmental Panel on Climate Change has observed that extreme hot weather events have become both more frequent and intense across most land regions since the 1950s. Elevated heat levels intensify health threats when large groups gather outdoors or in confined spaces. Vulnerable populations such as older adults, individuals with chronic illnesses, and those engaged in physical activity face increased risks. Additionally, workers and volunteers spending extended hours outside—such as security personnel, medical staff, or logistical support—are also at heightened danger.
The guidance frames heat management as a component of broader public health and emergency preparedness strategies for mass gatherings. It encourages authorities and organizers to continuously assess conditions throughout the event lifecycle and to coordinate health protection with operational planning. The recommendations apply to various types and sizes of gatherings, including international sporting events, festivals, and religious assemblies. The focus remains on prevention, early intervention, and on-site care, while supporting existing national systems for heat-related health issues, emergency responses, and clinical management.