What heat brings to acute care
Researchers screened more than 1,800 diagnosis categories across nearly 917,000 acute-care encounters in Chicago.
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By
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Kathryn Wighton
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September 2, 2026
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Clinical Scorecard: What heat brings to acute care
At a Glance
| Category | Detail |
| Condition | Acute-care presentations related to extreme heat exposure |
| Key Mechanisms | Increased incidence of renal and fluid-balance disorders, dermatologic conditions, and injury-related diagnoses due to high temperatures. |
| Target Population | Adults aged 18 years or older in Cook County, Chicago. |
| Care Setting | Emergency department and urgent care encounters. |
Key Highlights
- Extreme heat defined as warm-season 95th percentile daily maximum temperature (≥33.67 °C).
- Study analyzed 916,904 encounters among 372,140 adults from 2011 to 2023.
- Renal disorders, including volume depletion and acute kidney failure, were significantly associated with extreme heat.
- Injury-related diagnoses included lower-limb burns, accidental firearm discharge, and open wounds.
- Findings may be sensitive to seasonal exposure and limited by demographic representation.
Guideline-Based Recommendations
Diagnosis
- Monitor for renal and fluid-balance disorders during extreme heat events.
- Assess for dermatologic conditions and injury-related diagnoses in affected populations.
Management
- Implement hydration strategies and heat exposure education for at-risk populations.
- Provide immediate care for acute kidney failure and other heat-related conditions.
Monitoring & Follow-up
- Track emergency department visits during heat waves for targeted interventions.
- Evaluate long-term health outcomes related to heat exposure.
Risks
- Increased risk of dehydration and renal stress during extreme heat.
- Potential for higher incidence of injuries and external-cause diagnoses.
Patient & Prescribing Data
Adults presenting to emergency care during extreme heat events.
Focus on hydration and management of heat-related illnesses.
Clinical Best Practices
- Educate patients on the risks of heat exposure and preventive measures.
- Utilize a multidisciplinary approach for managing heat-related presentations.
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