People can die from this also, by drowning in the water they throw up, but that would be caused by other factors involved, like you could not change your position, or you had passed out or something like that.
If your urine is a pale pale yellow, not clear and not dark yellow (really just noticeably darker than normal), you are drinking enough water to clean your system out and be hydrated. If you think your dehydrated, darker urine is one indicator, doctors say that a person should drink 8 oz of water every 15 minutes until you pee, then 8oz every 30 minutes until your urine runs clear. Note, in this case, you want your pee to be clear at some point to assure that you are re-hydrated.