Wait until you need to go to an emergency room.
Already happened.
I had heat exhaustion, my body temperature had dropped to 93, I was vomiting uncontrollably and I was shivering in July 2005. There was a young man who had a piece of a stick in his eye that was jutting out and someone else who had cut themselves so badly that blood was seeping through a bath towel.
It took us minimum of 4 hours while we waited behind about 20 illegals- no speaking English, no insurance, no copay, no cash just free healthcare while we suffered.