Tidal river in El Salvador

TIL!

A tidal river is a river whose flow and level are caused by tides.

Freshwater tidal rivers discharge large amounts of sediment and nutrients into the ocean.[3] This is a necessary influx for the global water balance.

https://en.wikipedia.org/wiki/Tidal_river

What is she looking at up in the trees? I thought that they only come on the hottest years…

Are all of those people doing laundry in brackish water? Just straight sea water? I wonder how that affects things