Symptoms of both heat exhaustion and heat stroke include fatigue/weakness, headaches, and confusion or dizziness. However, in the case of heat exhaustion, your heartbeat slows down, muscles can cramp and there is excessive sweating accompanied by intense thirst. In the case of heatstroke, your heartbeat quickens, you can experience shortness of breath and your skin feels hot, with decreased sweating and urination. In both cases, the person affected should be moved to a cool, shaded location, given sips of water to drink and their skin needs to be cooled with water or ice (until medical help arrives).