Board Thread:Questions and Answers/@comment-31628427-20170623194415/@comment-28905095-20170625092953

First of all if you are playing MCPE Edition you don't have to worry about spawn chunks since they don't exist.

I don't think that lightning effects unloaded areas similar to the farms not being affected.

If you are stuck underground, then simply dig your way back up again. If possible, craft yourself a compass from iron and redstone, so that you easily can find your way back to spawn when you reach the top level.