Explanation:
waterfalls are temporary features of rivers because stream erosion is greatest at waterfalls and rapids. The water that falls at the base of the waterfall erodes rock there, leaving the rock at the tops of the waterfalls to overhang. Overall, undermining causes waterfalls to recede farther upstream.
Answer:
Secure all loose gear, hatches or ports. Determine your location and the best course back to shelter. Keep a sharp lookout for the other boats and obstructions.
