The heated water doesn't need to create bubbles from nothing.

Many hot springs give rise to streams of heated water.

Ikusa closed his eyes, as if at last he could enjoy the heated water.

The heated water can also be used to warm the air conditioning system inside the car, if so desired.

He went back in and heated water for a bath.

It's the path the heated water takes after being shot into the air.

The heated water stung his mouth, and that was good.

The increase in access to heated water made bathing more comfortable and popular.

He built a very small fire, heated water, and bathed his head.

Modern systems almost always use heated water rather than steam.