Between May 24 and June 7, the National Weather Service predictions for the Red River’s crest changed seven times, frustrating emergency responders who were working to place their resources most appropriately to deal with the threat of flooding, according to a report by The Shreveport Times.

Hundreds of homes flooded last week in northwest Louisiana from the swollen river.

According The Times’ report, the weather service would’ve called Red River’s crest better and sooner if it weren’t working with outdated models. While the models haven’t changed since a 1990 flood gushed nearly the same volume of water down the system, experts agree that the river and how it reacts to excess water have changed.

See the The Times’ report here.