Hes freaking dead.A person can't survive an explosion that happens right next to them.And there were fun facts about the show.And one of them said-The explosion was the first showing of somebody actually dying in the series so far-..
So like he's dead and so is his brother.The next season could be dealing with a different town..Something like that.So there will probably be another evil person or group..OR just Korra helping people xd
~ Well I'm outyum_strawberry
I think he'll survive. I mean, a character like that shouldn't have been ended that way. Who knows, he coulda bent a shield of protective water or something. They magically energy bent Korra into Avatar-ness, so why not right?