Humans are extremely good at survival. That is the reason we are the most populous species on the planet. We have come up with innovative techniques to somehow thrive even in the harshest of environments. And we still come up with very nifty tricks to survive even when nature shows its full wrath. With a good presence of mind and wits around you, you can use these tricks to survive a natural calamity too. Strap a torch to a 10 liter can of water for ambient light You can easily light up a room with this contraption when the power lines go out during a disaster.
Dry matches are a luxury during wet calamities such as hurricanes and tsunamis. Put them inside your torchlights because torchlights are waterproof, and the bulb inside will keep them moisture free.
When you get stuck under a lot of snow, spit. The spit will move in the direction of gravity, and you will know which way is down.
Start digging snow in the opposite direction. And do not give up.