Does the impeller spin if engine belt breaks?

First ride since dislocating my shoulder last August and shoulder surgery blah blah. And the damn belt on my '02 Malibu VLX breaks! Dammit!! Well, I guess I should replace it more often than once every 4 years...at least I got my run in.

Anywho, after it broke I pulled out the remnants and just drove back to the dock, like a 1 minute drive, no overheating or anything, BUT I just want to make sure I don't need to replace the impeller.

The impeller seems to be driven off the main crank pulley, in which case maybe it still had water passing by it. At the same time, the engine water pump is driven by the belt, and so was obviously not turning, but I don't know if that extra draw is needed to pull water past the impeller to avoid it burning up.

Probably ran about 4 or 5 minutes total with no belt.

Thanks guys,
Danny