GENEVA / RankWire.AI / – The World Health Organization (WHO) has introduced updated recommendations aimed at minimizing heat-related health issues during mass gatherings globally. These guidelines are designed for major sporting, religious, and cultural events, addressing the health risks faced by spectators, attendees, volunteers, and staff exposed to high temperatures for extended periods. An extensive review of recent evidence revealed nearly half a million medical encounters linked to such events in studies published from 1980 through 2025, with over 22,000 cases involving heat-related conditions.
Findings from the review indicate that medical services organized directly at event locations can effectively manage most cases without the need for hospital transfers. When event organizers have well-equipped on-site medical facilities, more than 90% of patients are treated at the venue. This approach alleviates the burden on local hospitals and ambulance services. The recommendations form part of a comprehensive toolkit for governments, event organizers, and health officials, blending research insights with practical strategies to evaluate and mitigate heat risks before and during large-scale gatherings.
According to the guidance, heat-related fatalities have surged by approximately 63% since the 1990s. On average, 546,000 deaths annually were attributed to heat from 2012 to 2021. Crowded environments can intensify exposure to high temperatures when individuals spend long hours outdoors. Additional risks include limited access to water, restricted movement, and stress from travel. Increased demand on health services may further complicate medical responses during large events.
Incorporating heat management into event planning and operations
The new guidelines emphasize the importance of providing accessible drinking water, sufficient sanitation facilities, and cooling infrastructure at venues. They also suggest adjustments to scheduling, improvements in crowd-flow control, and protective measures for event personnel. Organizers are advised to utilize public messaging, real-time health monitoring, and ready medical services as essential components of their planning. WHO stresses that heat protection should be integrated into the entire event process rather than relying solely on individual precautions. Factors such as venue design, transportation, security, and sanitation influence access to cooling and medical support.
This comprehensive package includes systematic reviews, an implementation guide, and a dedicated tool for assessing heat-related risks. It also offers materials to craft evidence-based public messages during periods of extreme heat. The assessment tool enables structured, repeatable evaluations before and during events. The overarching framework encompasses preparation, impact mitigation, and recovery phases. Event organizers are encouraged to incorporate these measures into existing emergency protocols, occupational safety standards, and national heat-health action plans.
Scientific evidence underscores the need for proactive heat precautions
The Intergovernmental Panel on Climate Change has reported that the frequency and severity of hot extremes have increased across most land regions since the 1950s. Elevated heat levels pose additional health challenges during large outdoor or crowded gatherings. Vulnerable groups such as older adults, individuals with chronic health issues, and those involved in physical activities face heightened risks. Furthermore, workers and volunteers often spend prolonged periods outside providing security, transportation, medical, or logistical support.
The guidance frames heat management within broader public health and emergency preparedness strategies for mass events. It urges authorities and organizers to continuously evaluate conditions throughout the event lifecycle and to coordinate health protection measures with operational planning. These guidelines are applicable across various types and sizes of gatherings, including international sports events, festivals, and religious ceremonies. The focus remains on prevention, early intervention, and on-site care, complementing existing national systems for heat-related health responses, emergency management, and clinical care.