What happened when the levees overflowed along the Mississippi River in 1927?
Nearby towns and farmlands were flooded.
Farmers quickly routed excess water back into the sea.
Coastal wetlands deteriorated due to increased water flow.
Authorities built emergency levees to prevent massive flooding.

Respuesta :

After several months of heavy rain caused the Mississippi River to swell to unprecedented levels, the first levee broke on April 16, along the Illinois shore. Then, on April 21, the levee at Mounds Landing in Mississippi gave way. Over the next few weeks essentially the entire levee system along the river collapsed.

I'm not to sure but I hope this helps.