Key Takeaways
- Extreme heat and humidity make it difficult for the body to cool down, especially for older adults and individuals taking medications such as diuretics.
- Information from Harvard Health Publishing suggests that high temperatures can aggravate heart disease, lung conditions, diabetes, and mental health disorders.
- Data shows that older adults experience a heightened risk of heat-related hospital admissions that can last up to five days after the hottest weather passes.
What the Source Says
According to Harvard Health Publishing, high heat poses specific dangers to individuals managing chronic health issues. Hot weather may elevate the risk of heart failure, heart attacks, and abnormal heart rhythms. For adults with lung conditions like asthma or chronic obstructive pulmonary disease (COPD), elevated heat, dehydration, and increased ozone pollution can make breathing more challenging. Research also indicates that inhalers stored in high heat may deliver lower doses of medication than expected.
For individuals with diabetes, extreme temperatures interfere with the body's ability to regulate temperature and blood glucose. High heat can also damage glucose monitors, insulin pumps, and insulin itself. Heat waves can lead to electrolyte imbalances, triggering symptoms such as nausea, headaches, and fatigue. Medicare data highlighted by the source demonstrates that multi-day heat waves commonly result in hospitalizations for heat stroke, acute kidney failure, and fluid or electrolyte imbalances.
Practical Notes
Harvard Health Publishing outlines several steps to help manage health when temperatures rise:
- Review daily weather forecasts early in the morning to prepare for unusually hot days.
- Create a plan to stay cool at home or identify a nearby cooling center in advance, rather than waiting for formal heat alerts. Specific indoor target temperatures are not specified in the source; please check the official notice.
- Stay in shaded areas when outdoors, and move inside to a cool space immediately if you feel symptoms arising.
- Maintain hydration with water and electrolyte-replenishing drinks, checking labels carefully for added sugar if you have diabetes.
- If extreme heat causes severe emotional distress or thoughts of harm, contact 988 for crisis support.
Please talk to your doctor to understand how high temperatures may impact your health and to establish a personalized safety plan for hot weather.
Source: Harvard Health Posts by Harvard Health Publishing Staff Feed · Published September 27, 2026
This article is for general information only and is not medical advice. Talk to your doctor before making health decisions.