Coolant leaked and took out power steering?

[NardoW12]

04 X5 3.0i, about 122000 miles.

I was driving on the road yesterday and suddenly saw white smoke came out of the car, I stopped right away and turned out that the white smoke is vaporized coolant liquid, steam.

I was very close to home when this happened and I grabbed some distilled water, added into the coolant tank, and drove it home slowly (to make sure the engine doesn't over heat)

One thing I noticed after this happened was that the power steering is gone, and I tried again today, the car would start up ok and is drivable(as long as I put some coolant in since it leaks away slowly) but the power steering is still gone.

I'm planning on taking the car to a mechanic soon but what do you guys think caused the power steering issue?

I have checked the power steering fluid and it's almost full, don't know how to check the pump but the pump was replaced two years ago and worked perfectly till the coolant leak occurred...



Also if anyone know a good mechanic shop in Houston area please PM me.