Define the different types of heat injuries and identify ways of reducing heat injuries

There are three main types of Heat Injuries (from least to most dangerous, all three are found in the Glossary):

Heat Cramps (muscle spasms)

Heat Exhaustion

Heat Stroke

Here is a webpage that describes those types (and a few less problematic issues) as well as how to reduce the chances of getting them (the page starts with the most severe injury).

https://www.cdc.gov/niosh/topics/heatstress/heatrelillness.html

Once a person develops one of the heat injuries, he/she is likely to get them again. So prevention is the key to not let the heat hurt anybody.

The biggest part of prevention is staying hydrated or preventing dehydration (which is an excessive loss of body fluid). You need to drink as much water before, during, and after exercise when it is hot. The BEST way to determine if you are well hydrate is by using the urine test... yes you read that correctly, urine test. Later today, I know everybody is going to do this, compare your urine to the following chart. Your urine should resemble the top 3 colors. The closer it gets to the bottom, the more Dehydrated ("Glossary") you are. So how hydrated are you?

And this is not just to prevent heat injuries, by the way. Those people below the RED line in the image above have a tendency to develop headaches from the lack of fluid in their body.