When the summer heats up, many of us try to stay indoors as much as possible. But there are times when you need to be outside for work, events and activities. Excessive heat can lead to dehydration, heat exhaustion and heat stroke. We explain the different symptoms you should look for and ways to help prevent and treat each one. DEHYDRATION Dehydration happens when you aren't getting enough fluids. This can lead to your body not functioning properly. It is a cause of both heat exhaustion and heat stroke. It doesn't just happen during excessive heat. Dehydration can also be...