I am not sure what caused this, but I was playing on my friend's survival mode server that we've been using for about a year. I was about to head into my mineshaft by my house to get supplies, then the server went down for a moment, which it regularly does. I logged back in and this is all I see for hundreds of blocks. I'm still at the cords of my house, but everything around me is bedrock, the sky is red, and there is no way out. I've checked back hours after the fact in case I was glitching and nothing. I don't have any texture packs or mods, so I don't know what this is, also the biome reads hell, I can't find any good information about a hell biome, but since my cords are the same for my house I'd assume I'm still in the jungle biome where my home is. Anyone know why this happened? I'm assuming the data went corrupt, but it's hosted over a site's server, that only my friend knows the information to, so I don't know what to do.
You are on top of the roof of the Nether, which has the biome name of "Hell"; somehow the game placed you in the wrong dimension (if Nether chunks were just moved to the Overworld the sky would look normal; at least, it does in 1.6.4 as I just recently made a Superflat world set to the Nether to test something and it was just a normal world with yellowish-brown grass and Nether mobs spawning. Both the End and Nether themselves owe many of their features to the dimension, not the biome).
If you are OP you can enter "/gamerule keepInventory true" (it must be capitalized like this, minus the quotes) or give yourself an Ender chest and place your items in it and kill yourself (this will avoid any possible mistakes with keepInventory) and you should respawn in the Overworld. Otherwise, you can notify your friend (presumably the server owner) about the situation.