High waters, also known as floods, inundations or deluges, refer to an overflow of water beyond its usual limit. Another synonym for high waters is "freshet," which is a rush of water caused by heavy rainfall or melting snow. "Flash flood" is another term for high waters that come and go suddenly, often with little to no warning. "Tidal surge" occurs when water floods inland due to a high tide or storm. "Rising waters" refers to the gradual increase of water levels, while "overflow" describes when water exceeds its banks. "Floodwaters" is the general term used to describe water that has overflowed and spread beyond its usual boundaries.