I have read in the past that a cave (esp one with a small entrance) is better than a Forest Service fire shelter. As the fire passes through, it may use up all the oxygen right there, and you'll likely pass out, but as the fire passes, oxygen will flow in again. If you can't survive in a cave, you wouldn't have survived in one of those tiny shelters.

The popular idea of heading for deep water is fine, if you've got a boat. As the fire goes through/over where you are, the temporary lack of oxygen could cause you to pass out, and if you're in water, you could drown.

Being aware of your surroundings is crucial when you're outdoors. The sooner you know about something like this, the more leeway you've got in choices.

If you refuse to evacuate when warned, there's no reason for other people to endanger their lives because you suddenly realize you've made a bad decision.

And don't whine.

Sue