26°C may be the magic number to keep seniors safe in heat waves

NCT ID NCT06633302

Completed Knowledge-focused Sponsor: University of Ottawa Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether keeping indoor temperature at 26°C (about 79°F) can prevent dangerous heat strain in older adults during a multi-day heat wave. Researchers exposed 18 adults aged 60-85 to simulated heat conditions over three days and two nights, measuring core temperature and heart strain. The goal is to see if current temperature recommendations are enough to protect vulnerable seniors, especially when power outages limit daytime cooling.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this could help refine indoor temperature guidelines to better protect older adults during heat waves.
What could go wrong: This is a small, completed study with only 18 participants, so results may not apply to all older adults. It also simulated heat in a lab, not real-world conditions.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

Fatigue Heat Stress Disorders hypertensive disorder Hyperthermia type 2 diabetes mellitus

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

HEAT STRESS PHYSIOLOGICAL STRESS

Contacts and locations

Locations

University of Ottawa

Ottawa, Ontario, K1N1A2, Canada

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