Heat-Related Illness and Hyperthermia
Mental Health and Substance Use
Potential Health Issues
- Alcohol and substance use: intoxication, overdose, emerging substances, associated violence and domestic violence risk
- Acute stress reactions: anxiety, panic
- Emotional dysregulation: irritability, anger, frustration
- Reduced cognitive functioning: impaired concentration, decision-making, coping capacity
- Cumulative stress: fatigue, sleep deprivation
- Exacerbation of pre-existing mental health conditions
Clinical Considerations
- Alcohol and substance use: Screen; manage intoxication and overdose; ensure safety; refer as needed
- Acute stress reactions: Provide brief psychological support (PFA)
- Emotional dysregulation: Apply de-escalation; assess risk to self and others
- Reduced cognitive functioning: Simplify communication; support decision-making; reinforce coping
- Cumulative stress: Advise rest; monitor for deterioration
- Pre-existing mental health conditions: Review history; ensure medication continuity; refer as needed
Referrals
Refer or escalate to mental health services as needed for any clinical presentations.
Extreme Weather Conditions
In addition to threats from summer heat, heavy rains and flash flooding can occur with little warning during summer months, along with impaired air quality, especially in the context of extreme heat or wildfires elsewhere.
Potential Health Issues
- Exacerbation of chronic illness from exposure to very hot weather and impaired air quality
- Injuries and drowning risk from rapidly rising water levels.
Clinical Considerations
- Advise people to monitor weather forecasts for any extreme weather conditions and sign up for Notify NYCM weather alerts.
- For impaired air quality, advise people to keep windows closed, use an air purifier at the highest setting, wear N-95 or KN95 masks if outdoors, and monitor changing air quality conditions.
- People with heart or respiratory conditions, such as asthma or COPD, as well as those who are immunocompromised, older adults, and people who are pregnant, are more sensitive to wildfire smoke.
- For AQI above 200, consider rescheduling appointments or using telehealth.
- Advise people to pay attention to symptoms, reduce physical activity and/or go indoors if they experience watery eyes, scratchy throat, or difficulty breathing.
- Consider sharing the Outdoor Air Quality Health Recommendations Based on Air Quality Index
- Very hot weather can be more dangerous than poor air quality. If it is hot outside, people should find a cool indoor space.
- Direct people to resources about flash flooding and coastal storms.
- Immediately report deaths where heat exposure is suspected as a direct or contributing cause to the NYC Office of Chief Medical Examiner at 212-447-2030.
- Discuss the signs and symptoms of heat-related illness, including guidance on when to call 911, and the risk of heat exacerbating chronic conditions with individuals and their caregivers.
- Drug and alcohol use can increase the risk of overheating and dehydration, and/or mask symptoms of overheating.
- Hot weather also increases adverse reactions to stimulants like cocaine and methamphetamine.
- Advise people to monitor weather forecast for any extreme weather conditions and sign up for Notify NYC alerts.
- People with diabetes should check their blood sugar more frequently, as high temperatures can change how the body uses insulin.
- Encourage people to use air conditioning; guide those without AC to cool spaces or public air-conditioned spaces (such as libraries or malls) or to visit a friend or family with an AC.
Potential Issues
International attendees may present unique clinical challenges, including unfamiliarity with the U.S. healthcare system, insurance limitations, and payment barriers. Providers should also be prepared for cultural sensitivities and translation needs, as well as difficulties with follow-up contact, case investigations, and contact tracing. Additionally, unknown vaccination histories among travelers may increase the risk of communicable disease transmission.
Due to the nature of the 2026 FIFA World Cup, we expect both visitors who live outside of NYC as well as NYC residents visiting other host cities.
Major International Tournaments
Information observed in historical surveillance data from major international tournaments that may be relevant to the 2026 World Cup:
- Heat-related illness
- Heat-related illnesses have been a consistent public health concern throughout many international sporting tournaments around the world.
- NYC has also seen increasing summer temperatures in the past several years. While the NYC Health Department cannot predict this summer’s weather patterns, based on past international tournaments, heat-related illnesses are expected to occur among World Cup spectators, visitors, and team members.
- Measles
- Flagged at 2002 Korea Japan, 2018 Russia (28 of 32 nations had active outbreaks), and the 2025 Club World Cups
- NYC will draw international visitors from countries with known outbreaks and MMR gaps
- GI illness
- 2025 Club World Cup had multiple player hospitalizations for acute gastroenteritis, likely compounded by heat-related immune suppression
- 2006 Germany World Cup had contained norovirus outbreak of 61 cases
- Travel exposures
- Three-host format (Mexico, Canada, USA) means travelers carry different exposure profiles across all three epidemiological environments
- Novel pathogens
- SARS relocated the 2003 Women's World Cup. Zika shadowed the 2016 Rio Olympics. Qatar was on alert for MERS in 2022 and mpox circulated globally that year.
Bellevue Project ECHO Recordings
NYC Health+Hospitals / Bellevue, the Region 2 Emerging Special Pathogen Treatment Center, has hosted a series of trainings related to FIFA World Cup Preparedness, featuring experts on topic areas ranging from mass casualty preparedness to bioterrorism.