BISMARCK, N.D. - Not all superheroes wear capes. And, in the summer, you can spot them wearing red uniforms and white crosses.
Lifeguards must go through a series of tests to get the job, and even harder challenges to keep it.
A relaxing day at the pool can spiral at any moment.
And in an instant, these lifeguards turn into superheroes.
"I've had to jump in and help a little kid in the pool because he jumped out of the tube and wasn't able to touch, " said Kylie Meyer, a lifeguard at Raging Rivers Waterpark.
But, before they hit the water, life guards have to pass a rigorous physical and written test which includes swimming 300 yards, and treading water for two minutes.
"We do have to dive in a diving well, and grab someone off the bottom, so that was probably the hardest part for me, " said Meyer.
Once they put the uniform on, the real challenge begins.
"You have to tell people to search for something going on, not just watch and look for it to happen," said Kendra Wagel, facility manager at Raging Rivers Waterpark.
Searching for improperly fit life jackets unsupervised children, and subtle signs of a drowning victim.
"Throwing their arms around. But really, in that situation, they're not always going to make a noise. It's going to be silent," said Wagel.
Eighty-six percent of waterpark injuries happen on water slides, and sometimes kids don't realize how deep the water is at the bottom.
That's why lifeguards are there to keep them safe, and get back to having fun.
But, it's not all hard work and no play.
"The best thing I have experienced about being a lifeguard so far is probably getting a sick tan," said Myles Schlosser, a lifeguard at Raging Rivers Waterpark.
Whether it's two people in the pool or two thousand, they know at end of the day they made a difference in someone's life, by saving them.