CDC guidance: indoor temperatures above 95F with high humidity pose heat-stroke risk within 4 hours for elderly, infants, and people with chronic conditions. During heat advisories, AC stops being optional for households with vulnerable members. The energy-cost-vs-medical-cost math always favors running AC. Utilities run cooling centres during heat advisories. Most US utilities also defer shut-off for past-due bills during declared heat emergencies.
CDC medical thresholds
Heat advisory triggers at 95F+ heat index for 2+ consecutive days. Excessive heat warning triggers at 105F+ heat index.
Vulnerable populations (elderly, infants, chronic conditions, outdoor workers) face heat-illness risk within 2 to 4 hours of indoor temperatures above 95F.
Energy cost vs medical cost math
Running AC during a 5-day heat advisory costs roughly $40 to $80 in extra electricity. Heat-stroke emergency room visit averages $3,500 to $8,500.
The cost math always favors running AC. Utilities defer shut-off during declared heat emergencies; verify your state utility commission rules.
Lock the rate before the next reset.
Seenra runs the supplier shortlist in 5 minutes. No credit pull, no on-site visit, no service interruption. Forever free for households.
Get my fixed-rate quote →Common questions
Quick answers from the editorial desk
When is 95F + humidity dangerous?
Utility shut-off rules during advisory?
Cooling center hours?
Fan vs AC math?
Further reading