Can I make tea with carbonated water?
In the interests of science I gave this a try. Used a can of carbonated water, boiled in my kettle. There was no boiling water explosion, although I more than half expected one. It seemed to maybe boil a little faster, but that's more likely due to the fact that it's less liquid than I usually heat. 

Being a tea fanatic I have a lot of flavored teas but I opted for PG Tips, figuring I would taste any difference a little more easily. I caught very little flavor difference from usual, maybe a little stronger but that could be chalked up to any number of things besides using carbonated water.

So yeah, I think carbonated water would probably work in a pinch. Probably don't put too much of it in the kettle, though. (A small part of me still suspects that had it been full it would have shot boiling water everywhere).