Echo Clint's comments. Late in the season if you are not climbing fast you really need to check the weather to see how big a window you have to do your route safely. Being overdue can have huge consequences as we saw here.
The reason I asked about the permit season is that I was wondering if they had one of those "unclaimed day use permits".
I thought those were issued late in the day, but after checking, I was wrong - they are issued at 2pm the previous day.
An experienced friend of mine from Washington was affected by lack of knowledge about the permits.
They wanted to do Russell and didn't realize permits were required until they got to the ranger station. They wanted overnight permits but didn't win the lottery. They did get unclaimed day permits.
Fortunately all 4 of them are quite fast, and it was in August, so they did Fishhook car-to-car from 6am to 10pm, in spite of getting offroute on the approach. http://www.stephabegg.com/home/tripreports/california/russell
I can imagine if people don't understand the permit situation, they might end up trying with a day permit when they don't have the speed, figuring "I drove all the way over here; I can probably pull this off."
But it's still on them if they take that risk.