Tropical Weather

Clouds cover the sky over New Orleans ahead of Tropical Storm Barry making landfall in the Gulf of Mexico on Saturday, July 13, 2019. (AP Photo/Matthew Hinton)

NEW ORLEANS (AP) — Carrying "off the chart" amounts of moisture, sprawling Tropical Storm Barry crawled slowly toward shore on Saturday, knocking out power on the Gulf Coast and threatening millions with heavy rains that could last for days in a test of flood-prevention efforts implemented after Hurricane Katrina devastated New Orleans 14 years ago.

As natives and tourists in the Big Easy, Baton Rouge and other heavily populated areas in the storm's path hunkered down or wandered through quiet, emptied streets waiting for the worst, the Coast rescued more than a dozen people from the flooded remote island of Isle de Jean Charles. Water on the island had risen so high that some residents were clinging to rooftops by the time help arrived.

Video showed water overtopping a levee in Plaquemines Parish, a finger of land extending deep into the Gulf of Mexico, downstream from New Orleans. Officials were still confident that New Orleans' levees would hold firm. Most of the levees range from about 20 to 25 feet (6 to 7.5 meters) in height.

Officials predicted Barry would make landfall as this year's first hurricane in the morning near Morgan City, west of New Orleans. The small town had an overnight curfew that expired Saturday morning, after on-and-off rain and power outages. People used cellphones to see in the dark, and opened doors and windows to let the warm, sticky tropical air circulate.

More than 45,000 people in southern Louisiana had lost power, and some roads were underwater as the edges of the storm lashed southern Louisiana and coastal Mississippi and Alabama with rain.

Though expected to be a weak hurricane — just barely over the 74 mph (119 kph) wind speed threshold — Barry threatened disastrous flooding across a swath of the Gulf Coast. By Saturday morning, the storm system had gathered a "big slough of moisture," meaning "a lot of rain is on the way," said National Hurricane Center Director Ken Graham.

During a storm update through Facebook Live, Graham pointed to a computer screen showing a huge, swirling mess of airborne water. "That is just an amazing amount of moisture," he said. "That is off the chart."

On the remote Isle de Jean Charles, about 45 miles (72 kilometers) south of New Orleans, Coast Guard rescuers used helicopters to pluck some residents from rooftops and loaded others into boats from flooded homes, Petty Officer Lexie Preston said.

Barry was moving so slowly, it was likely that heavy rain would continue throughout the weekend across Louisiana, Graham said. There were predictions of 10 to 20 inches (25 to 50 centimeters) of rain through Sunday across a swath of Louisiana that includes New Orleans and Baton Rouge with some parts of the state possible getting 25 inches (63 centimeters). Looking ahead, tracking forecasts showed the storm moving toward Chicago, swelling the Mississippi River basin with water that must eventually flow south again.

Water was flowing over a levee in Point Celeste in Plaquemines Parish, Lt. Gov. Billy Nungesser said. He said crews were working to contain the water.

Governors declared emergencies in Louisiana and Mississippi, and authorities took unprecedented precautions in closing floodgates and raising the barriers around New Orleans. Gov. John Bel Edwards said it was the first time all floodgates were sealed in the New Orleans-area Hurricane Risk Reduction System since Katrina. Still, he said he didn't expect the Mississippi River to spill over the levees despite water levels already running high from spring rains and melting snow upstream.

Rescue crews and about 3,000 National Guard troops were posted around Louisiana with boats, high-water vehicles and helicopters. President Donald Trump declared a federal emergency for Louisiana, authorizing federal agencies to coordinate relief efforts.

There was one piece of good news: Late Friday night, forecasters said the Mississippi River was expected to crest in New Orleans at about 17.1 feet (5.2 meters) on Monday, not 19 feet (5.8 meters) as had been earlier predicted. The levees protecting the city range from about 20 to 25 feet (6 to 7.5 meters) in height.

On-again, off again rain hit New Orleans overnight. As day broke, streets in the normally raucous French Quarter tourist district were largely empty and barely damp. Street sweepers rambled by. It was breezy, but flags on balconies overhanging the empty streets still occasionally fell limp. A few cars were out on roads. Some nearby homes had piled sandbags outside their doors.

"So far it's been really nice. It's been cool. It's been a little breezy," said Wayne Wilkinson, out with his dog in the French Quarter. He welcomed the pre-storm respite from July's normal heat, but said he was mindful things could change: "I know we have to be on the alert."

Baton Rouge , which was devastated by floods in 2016 , was similarly quiet Saturday, with puddles left from overnight rains, wind shaking the trees and only a few cars and trucks on thoroughfare Interstate 10. In Alabama, rain pounded the eastern shore of Mobile Bay overnight, with scattered power outages in communities including Daphne, along Interstate 10.

Authorities told at least 10,000 people in exposed, low-lying areas along the Gulf Coast to leave, but no evacuations were ordered in New Orleans , where officials urged residents to "shelter in place."

Before they did, people packed stores to stock up on bottled water, food and other essentials.

Lifelong New Orleans resident Terrence Watkins grabbed supplies at a Costco. He said he has a few simple big-storm rules: "Stock up on water. Stock up food. Get ready for the storm — ride it out."

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