The three C's (character, collateral, and capacity)
Pros of using email messages is no one knows your number. By knowing your number then they have access to your area code and can eventually find out where you are located. A con of using email messages you cannot call someone and hear their voice.
Heat stroke can kill or cause damage to the brain and other internal organs, and is most likely to effect someone doing an activity like, Working out, playing soccer, playing basketball.
Hopefully this could help :)