Sentence:  As we swung around, the full force of the current caught us and drove the stern against the rocks; there was a thud which sent a tremor through the whole craft, and then a moment of nasty grinding as the steel hull scraped the rock wall. I expected momentarily the <WSD>inrush</WSD> of waters that would seal our doom; but presently from below came the welcome word that all was well. 
Meaning of the word marked with <WSD> tags:  A crowding or flooding in.