BATON ROUGE — Gov. Bobby Jindal’s chief coastal adviser said Wednesday a decision will be made later Wednesday on whether the levee on the east bank of Plaquemines Parish should be deliberately breached to relieve flood water pressure on it from Hurricane Isaac. Garret Graves said that would be the last resort if other means to relieve the pressure on the levees fail.

Jindal said that between nine and 40 people have been trapped on the east bank and are being rescued by the National Guard. . .