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Story summary
- A study in the American Journal of Preventive Cardiology found about 80% of U.S. heart-related deaths occurred below 74°F.
- The analysis covered more than 14 million U.S. heart deaths from 2000–2020 and linked about 800,000 to cold weather versus 40,000 to warmth.
- Cold temperatures raise blood pressure and heart oxygen demands, increasing the risk of heart attacks and strokes.
