The Mississippi River's flow is the weakest it's been in 35 years. Seawater overtaking the river could make New Orleans' drinking water too salty for months.

• Saltwater will soon rush into the Mississippi River, which hit its lowest flow rate since 1988.
• That means the drinking water for thousands of Louisiana residents will be polluted.
• Gov. John Bel Edwards said the crisis could last until January and affect 20% of the state.

For the second year in a row, the Mississippi River water level is at an extreme low.