NEW : The lock authorities feared would fail was on a man-made canal that juts off the Pearl River , near the Mississippi state line . Secretary Napolitano visits the Gulf Coast ; President Obama is coming Monday . A mandatory evacuation is lifted around a strained Louisiana canal . The Associated Press contributed to this report. Hurricane Isaac dumped heavy rains on the area last week .
NEW : Secretary Napolitano visits the Gulf Coast ; President Obama is coming Monday . A mandatory evacuation is lifted around a strained Louisiana canal . The Associated Press contributed to this report. Hurricane Isaac dumped heavy rains on the area last week .