a question about heat exhaustion

[SWFLguy]

I was working the plate in a game last night. I thought I had hydrated enough and felt I was in good enough shape to do the game. Got into the top of the 7th and over 2 hours of a slow moving contest when I began to feel like I was running out of gas. Finally I realized I was in trouble. I called my partner over and discussed it with him. I called over both coaches and explained the situation. Suggested the game finish with a single umpire behind the pitcher. I sat down and was soon assisted by school personnel who helped me cool down and get me on my way home. I didn't feel that immediate medical help was needed. I will get checked out before I accept any more games.
I've seen major league umpires bail out over the years. Wonder if anyone else here has had similar experiences.