Everyone going on a hike or remote fishing, etc. should have some basic survival gear in a small container suitable for the occasion, from a little camera pouch on the belt with fire and survival blankets in it, to a light little daypack with enough to prevent hypothermia, for example fire and a bivy bag, hand warmers, windbreaker top and bottoms and such, not too bothersome to interfere with your fun, but with enough to miserably survive a situation that can be caused by weather or an injury.
I carry a small camera pouch survival kit on my belt when backpacking, and wear it at all times like my knife, just incase I wander off for firewood or sight seeing and have to spend a night away from my backpack and tent.
I’m guessing she fell and couldn’t reach emergency supplies.