Hurricane Isaac: Dam in danger of falling, Louisiana orders evacuation

McComb: Louisiana officials have ordered evacuation of low-lying, sparsely-populated areas along the Tangipahoa River because an Isaac-hammered dam at a state park lake in southwest Mississippi near the Louisiana border is in danger of failing.

Officials in Tangipahoa Parish, La., fear the water it would pour into the already swollen river would flood low-lying areas downstream from the park.

But Mississippi officials say they don't believe the volume of water in the 700-acre lake at Percy Quin State Park near McComb, Miss., would add enough flow to threaten communities downstream.