Why are rivers dangerous?

Answer 1

Rivers often flood every spring or summer each year, causing damage to houses and yards. You can drown in the river if the river is wide and deep enough, even if you are one of the best swimmers. Most rivers will get over 8 ft deep to even a few hundreds of feet. There have been reports from fishermen about carnivorous fish, water snakes, and even alligators being found in rivers. The bacteria and some water plants from a river can get you sick when you swim in. Large rapids in rivers can get you wet easily and possibly trip you down on the river.

Answer 2

BECAUSE

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Even slow, placid flowing rivers can be deceiving. Beneath the surface fast flowing currents of very cold water could catch out the unwary. A tree trunk flowing down stream could easily crash in to a swimmer. Unseen tangled tree roots also pose a danger. Often the current flowing along on one bank is a lot faster than the current flowing along the other bank, especially on a bend in the river.