Everyone here is ADHD and my son is ADHD and ODD- yet he is not one of those who ignores weather and other such circumstances.. In fact, he used to be a Cave Rescuer.
I don't think ADHD has anything to do with it. At least, not if they are intelligent and educated about weather and other such stuff.
You won't believe how many people do things like wild cave exploration w/ absolutely no idea how to do it. Like wearing flip flops in to the wild cave, not having helmet, etc.