Canadiana question: is "hydro" a blanket term for "electricity"?

I just read a Globe and Mail story that referred to windmills -- the things that are spun by the wind -- as "hydro windmills."

I can imagine how all this started but I gotta say it's really confusing seeing a term that literally means "water" being used for things that are not water. Would a Canadian say "hydro coal"?

#Canada #askACanadian

@rwg I've thought "hydro" in that sense was an Ontario thing.

I used to believe it was important to care about words and meaning but I've let go of that. Sorta. 

@puzzled The writer in question stated they were from BC originally, though that doesn't negate your observation that maybe it's an Ontario thing.

I can't let go of words -- they're all I have left