2006 Hyundai Azera Possible hole in the radiator

My check engine light came on and my car just started running hot, smoking and lost power. I checked the oil and the oil was good. I checked the antifreeze and it was good. I checked the water and it was clear but low. I put water in it, then when I cranked it back up all the water sucked out of it. I put more water in the car then looked under the car and seen what looked like water coming out the bottom of the radiator but I'm not totally sure. There could be a whole or crack in the radiator but like I said I'm not totally sure on this. From what I have described to you, what is your professional opinion as to what the actual problem could be, and why are these mishaps occurring? Also what can I do to fix the problems and keep this from occurring again?