Of course one easy way to tell if someone is on their way to your location is to … look.

It’s also a good way to tell if there is something happening around you that you might want to be aware of.

If it seems simpleminded for me to say these things, you would be surprised how much these things need to be said.

In an emergency situation, people tend to develop tunnel vision. Things immediately at hand take on increased importance. The further off a thing is, the more likely it is to be ignored. That is natural, and a good survival characteristic. If you do not stop serious bleeding, it does not matter if rain is coming.
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