Survival Hacks: Light and Sound Signals

Your phone battery can actually save your life in a fire and most people throw away the one

tool that could signal rescuers in the wilderness. If you're trapped in a building filling

with smoke, get low and use your phone's flashlight against a window. The beam cuts through

smoke way better than yelling and firefighters spot it instantly from outside.

Here's the wild part. That empty plastic water bottle you were about to toss?

Crush it halfway, poke tiny holes in the cap, fill it with dirt or sand,

and you've got an emergency whistle that carries over a mile. Blow across the

cap opening. Search and rescue teams say most lost hikers get found because of sound,