2002 Town and Country went to the store last.

Look at the power steering fluid reservoir and you'll see it's wet around the fill cap. That is commonly caused by turning the steering wheel while the pump is not running. Doesn't matter if the belt came off or the engine was simply not running. Replace the belt, refill the power steering fluid, and wash the area with an engine degreaser. If you would have listed the engine size I would have told you if you can drive the van home that way. On some of them the water pump is driven by the timing belt so the engine would not overheat. You would just have hard steering, and the battery will run down in about a half hour to an hour, depending on how much you use the brake lights, head lights, heater fan, etc. On some engines the water pump is driven by the serpentine belt so the engine will overheat in a few minutes. I've nursed cars over 40 miles with a non-functioning water pump but it involves lots of coasting with the engine off and lots of waiting for the engine to cool down. I don't recommend that with the newer engines.