POSTED: Wednesday, August 29, 2012 - 8:00am
UPDATED: Wednesday, August 29, 2012 - 8:04am
NBC NATIONAL NEWS — Cities along the Gulf Coast are feeling the affects of Hurricane Isaac.
Waves battered the walls meant to keep water off low lying roads as Isaac pushed its way through the gulf Tuesday.
Several parts of southern Louisiana are under flood warnings and roads have been closed.
Thousands are under mandatory evacuations in the Plaqamines Parish and other coastal communities.
Clouds sped over New Orleans as the storm began its assault on the city.
President Obama is promising a quick response to any emergencies as Isaac intensifies, and warning residents to heed evacuation warnings from officials.
Isaac will be the first major test of the $14 billion makeover to New Orleans' levee system, which failed in 2005 during Hurricane Katrina.
"I have faith in God, but not in these walls!" says New Orleans resident Lisa Haywood.
Other like Haywood aren't quite ready to trust a system whose failure cost them their homes during Katrina.