Why 78°F May Not Be Ideal for Everyone During Heat Waves
Why 78°F May Not Be Ideal for Everyone During Heat Waves
US · Published Jul 22, 2026
• Across the U.S., summer heat waves are driving up electricity usage and costs, prompting recommendations to set thermostats to 78°F (25.6°C) or higher to save energy.
• However, experts caution that this temperature may not be suitable for all households, as comfort and safety vary based on individual needs, home insulation, and cooling system efficiency.

Impact & Risks

Heat waves pose significant risks, particularly for vulnerable populations such as infants, the elderly, and individuals with pre-existing health conditions. Prolonged exposure to high indoor temperatures can lead to heat stress, dehydration, and even heat stroke, which is a medical emergency. Additionally, the financial burden of running air conditioning, which can account for over 50% of summer energy bills, may strain household budgets. Residents in poorly insulated homes or areas with high humidity are especially at risk of discomfort and health complications.

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