The heat illness that Mike was experiencing when working hard at marching band practice on a hot Saturday afternoon is Heat cramps.
Heat cramps can be described as the painful as well as the involuntary muscle spasms that a person can experience after heavy exercise in hot environments.
In this case, it can bring flushed moist skin and sharp pain the legs after exercise.
Learn more on Heat cramps at ; https://brainly.com/question/13439286
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