Symptoms of heat stroke include dizziness, headache, fatigue, nausea and vomiting according to WebMD. Other signs of heat stroke are flushed skin that is either hot and dry or cold and clammy, a body temperature of 104 degrees Fahrenheit or higher, shortness of breath and confusion or delirium.
Heat stroke is a serious heat-related illness. It can come on without warning and requires immediate treatment, states Mayo Clinic. Untreated heat stroke can cause damage to the brain, heart, kidneys and muscles. Heat stroke can even be fatal, warns WebMD. Medical care should be sought for anyone who exhibits symptoms of heat stroke after being in a hot environment. Some additional symptoms of heat stroke include anxiety and abnormal behavior, very fast or very slow heartbeat and convulsions.
Since heat stroke is so dangerous, it is best to prevent it from happening in the first place. To avoid becoming overheated, people should refrain from doing strenuous activities in extremely hot weather, says MedicineNet. When activity in hot conditions is unavoidable, precautions should be taken to prevent dehydration. Drinking plenty of water and making sure to replenish electrolytes is key. Diuretic drinks like coffee, alcohol and soda should be avoided because of their dehydrating effects. Taking frequent breaks and wearing light, breathable clothing can also help.