SANANTONIO-- A lifeguard's primary responsibility is to ensure the safety of the public. But one morning in New Braunfels, rescue workers were faced with the challenge of saving one of their own.

Every summer thousands visit Schlitterbahn. The popular New Braunfels water park employs a staff of more than 1,900 employees.

Monday, July 1st, started out like any other day for Joshue Brody Rester.

My staff itself ... I was telling them, today is going to be a hot day and to be ready ... with no forthcoming of what would happen to me, Rester said.

Seconds later, the 21-year-old lifeguard made an urgent call on his radio before he went into full cardiac arrest. At that point, it was up to his fellow lifeguards to save him.

I thought I was pretty blessed ... there's not a better place for this to happen -- if it was going to happen -- than here.

Rester has always been extremely athletic; he's played sports all throughout his life.

However, Rester has had a heart condition that had gone undetected, until last Monday.

Staff members rushed to save Rester, who was then air-lifted to University Hospital.

The people here did everything they were trained to do ... there's many thanks to go around, Rester said.

Doctor's said the Schlitterbahn team's immediate response saved Rester's life.

Brody now has an internal defibrillator to help him protect his health in the future.

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