According to the United States Army Corps of Engineers, the levees are holding in the New Orleans, despite ongoing battering by Isaac for an extended period.
In a statement released on the Army Corps website, "The New Orleans Hurricane and Storm Damage Risk Reductions System (HSDRRS) is performing as designed and we are confident in the system."
The system includes a series of pumps, levees, canals and gates.
Earthen levees in Plaquemines Parish were being overtopped early Wednesday, but they are outside of the federally designed and maintained system.
The Corps was providing assistance in Plaquemines Parish and will continue to monitor the HSDRRS throughout the Isaac event, according to the site.
Storm surge levels are peaking generally as forecast by AccuWeather.com. However, levels are remaining high a bit longer than forecast, due to the stall that occurred with Isaac early Wednesday morning.
Forward motion of Isaac will resume and the storm will weaken now that the center is drifting over land. Since Isaac is a large system, above-normal tide levels will continue throughout the day Wednesday and can still occur to some extent into Thursday.
People sit on a bench along the seawall in the storm surge from Isaac, on Lakeshore Drive along Lake Pontchartrain, La., as the storm approached landfall Tuesday, Aug. 28, 2012. (AP Photo/Gerald Herbert)
A significant storm surge occurred in the Shell Beach, La., area with levels between 9 and 11 feet above normal during the late evening hours Tuesday and the early morning hours Wednesday.
The greatest storm surge, perhaps near 12 feet based on twitter photographs, has occurred in part of Plaquemines Parish, near the mouth of the Mississippi River. The storm surge was enhanced in this area due to Isaac strengthening upon making landfall and the angle at which the water was being directed toward the coast.
Tidal backup was forecast to produce major flooding of the Jourdan River in southernmost Mississippi later Wednesday by National Weather Service hydrologists. Prior low water levels on the Mississippi River prevented flooding around New Orleans.
At Pascagoula, Miss., a storm surge of about 4 feet was occurring and peaking during the midday hours Wednesday.
Levels of Lake Pontchartrain at New Orleans were running about 6 feet above normal, well within what the levee system should handle.
In Grand Isle, La., a storm surge of around 5 feet was occurring Wednesday midday. Above-normal levels will continue in the area into Wednesday night.
Farther west in the Morgan City, La., area, the circulation around Isaac was producing below-normal tide levels. However, even as the storm diminishes, its northwest movement and eventual southern winds will produce above-normal tides later Wednesday into Wednesday night.
Farther east, in Mobile Bay, Ala., a storm surge of 3 to 5 feet above normal will continue through Wednesday. Tides will gradually return to normal by later Thursday.
In the Panama City, Fla., area, tide levels will continue to run between 1 and 3 feet above normal, due to the southerly flow off the Gulf of Mexico from the big storm.
Cyclonic Storm Kyant will unleash heavy rain and strong winds on areas from western Myanmar to northeastern India and Bangladesh this week.
Beneficial rain will douse California late this week, with the potential for some rain to reach southern portions of the state.
A storm will slide in from the Midwest to bring another dose of cold rain and wet snow to parts of the northeastern United States from Wednesday night to Thursday.
Floods are underrated weather hazards that cause widespread destruction, but people can minimize risks by following certain safety measures and investing in flood insurance.
Flooding downpours and thunderstorms will target a part of the central United States into Wednesday.
The severe drought in the northeastern U.S. has left most of the region reeling for months as farmers have been forced to work with arid land.
Ashford, CT (1758)
"The 25th day of Oct., 1758, a very stormy day of snow, the 26th snowed all day, storm held from Friday night until Saturday morning." by Ebeneser Byles, Town Clerk of Ashford.
Tampa, FL (1921)
Hurricane "most destructive/highest tide," pressure 28.81"/975.6 mb, winds 100 mph, tide 10.5 feet, six dead and $3 million damage.
Strong coastal storm with winds exceeding 100 mph over the ocean; 82-mph wind gust at south end of Chesapeake Bay Bridge Tunnel. Bethany Beach Delaware being evacuated as waves came over the dunes. Heavy snow in NC mountains. Mt. Pisgah - 11 inches; Mt. Mitchell - 6 inches.