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Heat stroke is an acute temperature elevation caused by exposure to excessive heat, or combination of heat and humidity, that overwhelms the heat-regulating mechanisms of the body. The latter is a relatively rare side effect of many drugs, particularly those that affect the central nervous system .
But the bigger killer in heat is the strain on the heart, especially for people who have cardiovascular disease, Jay said. It again starts with blood rushing to the skin to help shed core heat ...
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Heavy sweating causes heat cramps, especially when the water is replaced without also replacing salt or potassium. [2] Although heat cramps can be quite painful, they usually don't result in permanent damage, though they can be a symptom of heat stroke or heat exhaustion. Heat cramps can indicate a more severe problem in someone with heart ...
Frostbite occurs only when water within the cells begins to freeze. This destroys the cell causing damage. Muscles can also receive messages from the thermoregulatory center of the brain (the hypothalamus) to cause shivering. This increases heat production as respiration is an exothermic reaction in muscle cells.
Here’s a look at how people and animals around the world are trying to beat the extreme heat. A polar bear cools down in ice that was brought to its enclosure on a hot and sunny day at the zoo ...
The intense heat generated by a lightning strike can burn tissue, and cause lung damage, and the chest can be damaged by the mechanical force of rapidly expanding heated air. [ 4 ] Just as heat can cause expanding air in the lungs, the explosive shock wave created by lightning (the cause of thunder) can cause concussive and hearing damage at ...
The chance of a deadly heart attack can double due to the combo, the study finds, and several days of excessive heat and humidity alone up chances by 74%. Extreme heat and air pollution doubles ...