Emergency Department Visits and Ambient Temperature: Evaluating the Connection and Projecting Future Outcomes.

Area of Science:

• Environmental Health
• Public Health
• Climate Science

Background:

• Climate change is recognized as a significant public health threat.
• Rising ambient temperatures are a key concern for public health.
• Previous research indicates a link between heat and health outcomes.

Purpose of the Study:

• To investigate the impact of daily maximum temperature changes on hyperthermia and cardiovascular emergency department (ED) visits.
• To project future ED visits for hyperthermia under different climate change scenarios.
• To estimate the associated healthcare costs for these future visits.

Main Methods:

• Analysis of private insurance records for patients aged 64 and younger (May-September, 2005-2012).
• Statistical modeling to determine the relationship between daily maximum temperature and ED visits.
• Utilized five global climate models and two climate change scenarios to project future impacts across 136 metropolitan areas.

Main Results:

• A strong positive association was found between daily maximum temperature and hyperthermia ED visits.
• No significant relationship was observed between daily maximum temperature and cardiovascular ED visits.
• Projected an additional 21,000–28,000 hyperthermia ED visits by 2050 and 28,000–65,000 by 2090, with associated costs ranging from $6 million to $118 million.

Conclusions:

• Climate change is expected to substantially increase hyperthermia-related emergency department visits.
• Future heat waves pose a growing burden on healthcare systems.
• Urgent adaptation and mitigation strategies are necessary to address the public health impacts of climate change.