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Summer is no longer about being uncomfortable and thirsty. As temperatures soar, health is becoming a serious concern across India, particularly for the heart. Temperatures have already exceeded 44 to 46°C at several places in the country this year, and repeated heatwave warnings have been issued across northern and central India. Bengaluru, known for its moderate climate, has also been experiencing unusually high temperatures this season, and many residents are unaccustomed to the prolonged exposure to heat.

Why Extreme Heat Puts Pressure On The Heart

The reason is simple: when the body gets too hot, your heart has to work harder to regulate internal temperature. The blood vessels dilate. You sweat more. Your heart rate goes up to keep your blood flowing and to cool you off. We’re seeing more patients presenting not only heat exhaustion symptoms but also symptoms related to cardiovascular stress from extreme temperatures.

The whole process can be very stressful for your heart. For healthy people, the body can usually adjust. But for people with underlying conditions such as hypertension, diabetes, obesity, kidney disease, or pre-existing heart conditions, this added strain can quickly become dangerous. Excessive heat also causes dehydration, which reduces blood volume and forces the heart to work harder. This can lead to low blood pressure, irregular heart rhythms, worsening heart failure, or even heart attacks and strokes in susceptible people.

Warning Signs You Should Not Ignore

What makes the situation worse is that symptoms are often overlooked at first. Many write off dizziness, chest discomfort, unusual fatigue, palpitations, breathlessness, or excessive sweating as normal summer tiredness. Above all, don't ignore warning signs. Sometimes what feels like “just the heat” may actually be your heart struggling to cope with it.

Heat-Related Deaths Rising Globally

Heat health hazards are also rising globally. The Lancet Countdown Report says the number of older people dying from heat-related illnesses has increased significantly over the past 20 years due to climate change and rising temperatures. In India, the risk is especially high for senior citizens, outdoor workers, delivery personnel, traffic police, and those commuting long distances daily in extreme heat.

How To Protect Your Heart During Summer

Most of these emergencies can be prevented with early recognition and basic precautions. It is important to stay hydrated all day long, not just when you are thirsty. Stay indoors during the hottest parts of the afternoon, wear lightweight and loose-fitting clothes, and limit vigorous physical activity in extreme heat. Those who have heart diseases or BP-related ailments need to take extra care during the summer months.