2000 Hyundai Tiburon Tiburon blew alot of steam and coolant

My daughter's tiburon started to blow alot of steam and lost alot of coolant on the interstate. It is obviously on the passenger side of the engine compartment/fan belt side. It is not obvious where it is leaking from. I surmise the water pump? Or Heater hoses? Does a water pump blow coolant when it goes out? The main hoses to the radiator are on the driver's side of the engine. She states the car was still running when she pulled over and NO warning lights were on when she shut the car off. Thanks