I managed to get up and back down in not much longer than usual -- it just felt a lot longer. But on the way up, I witnessed the first mountain rescue I've ever seen. About halfway up, there is one spot on the mountain vehicles can get to. At that point, I saw the ambulance and a couple trucks arriving, and a couple EMT guys emerged. One began sprinting up the mountain, and on the way, he said a 14-year-old boy was suffering symptoms of heatstroke. As my shirt was already soaked through with sweat and my bottle of water quickly disappearing, that led me to wonder, "What exactly are the symptoms of heatstroke?"
The top third or so of the hike to the summit is rocky, and unfortunately, this was where the boy had to be rescued. This made safely retrieving him more difficult for the rescue crew because it's steep and not at all a flat surface for walking. When I got to the point where the boy was, the crew had loaded him onto a stretcher, and assisted by other hikers, they were slowly bringing him down. Overhead, we could hear a chopper approaching. The boy was breathing with difficulty and seemed very out of it.
Observing all of this gave me the chills, which couldn't have been provoked any other way, given where the mercury was today. I continued on my hike, perhaps stopping for some water more often than usual. As scary as this was, I want to emphasize that in four years of hiking this park, this is the first time I have ever seen this happen.
But if that's not a reality check, I don't know what is.