![]() ![]() Anyone can become dehydrated, and it can lead to serious complications for people at greater risk due to age, chronic conditions or outdoor activity like work or exercise. When the body loses more fluid than is taken in, the body may not have enough water or other fluids to carry out its normal functions. This can interfere with the body's ability to cool off and may create strain on the heart. Heat and sweating also can lower the amount of fluid in the body, which can reduce blood volume and lead to dehydration. Some people are at higher risk of being affected by humidity, including those who are over age 50, overweight, or have heart, lung or kidney conditions. The higher the humidity, the more moisture in the air. The greatest risks are when the temperature is above 70 degrees and the humidity is more than 70%. ![]() This causes the heart to beat faster while circulating twice as much blood per minute than on a normal day. High temperatures and high humidity can cause more blood flow to the skin. In summer weather, blood pressure can be affected by the body's attempts to radiate heat. High temperatures and high humidity are two factors that can cause serious health consequences for people with high blood pressure and heart disease. Weather can play a role in triggering certain health problems.
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