I was told from someone at the game the kid was taken out in the top of the first inning after the visiting team batted around. This was after the base umpire stopped the game to get him water. After he came out of the game and before the next pitcher was ready the coach came on the field and said they were done. They only had 8 players and they called an ambulance for their pitcher. He was released from the hospital that night and was back playing that next morning...
Also when the umpire was asked about the heat index he stated he never heard of anything like that. Something needs to be done because these kids just don't prepare themselves for the heat.