ELM GROVE, La. -- Huge military trucks rumbled through neighbourhoods in northern Louisiana on Thursday in search of families trapped by days of relentless rain, while men in rain gear waded through floodwaters up to their chests to rescue stranded animals.

The process repeated itself throughout the day and similar rescues were possible later Thursday in the southern part of the state, which also braced for heavy rain.

Davyon Hill, a meteorologist with the National Weather Service's office in Shreveport, said skies have cleared in the region, but the area is not yet out of the woods.

"It's not over with," he said. "There's still part of a low pressure system that's in Central Texas that is moving this way and overnight it will likely bring another bout of rain to the region."

State officials said a 6-year-old girl was among three people killed in Louisiana during two days of severe weather that has left roads covered in water and sent more than 1,000 people fleeing their homes.

Docia Winters hugged her 20-year-old son, Ryan Ficca, when he got off the back of a big truck Thursday morning. She said she and her husband and daughter evacuated their trailer on Wednesday, but Ficca had stayed behind to look after their 11 cats.

She said the water rose so fast, however, that Ficca was forced to leave without the cats.

"We don't know if they went under the trailer or where they are," she said.

Gov. John Bel Edwards issued a statewide emergency in all 64 Louisiana parishes late Thursday because more rain and severe weather was expected, and the National Guard was sent in to help. The declaration remains in effect until Friday unless terminated sooner, the governor's office said.

Guard spokesman Rebekah Malone said the Guard has evacuated 361 people from homes in Bossier, Ouachita and Morehouse parishes since Wednesday morning, using trucks that can travel though water 20 to 30 inches deep.

Guardsmen have also evacuated 70 dogs, 16 chickens and even a guinea pig.

In Bossier City -- across the Red River from Shreveport -- about 3,500 homes were under a mandatory evacuation as a precaution because a bayou was approaching the top of its levee. National Weather Service meteorologist Jason Hansford said Thursday morning that the bayou may top the levee or be breached. One weather spotter just north of Monroe reported more than 18 inches of rain since Tuesday night, he said.

Dozens of people were at a Red Cross shelter at the Bossier Civic Center in northwest Louisiana, shelter manager Colleen Morgan said.

Authorities were using high-water vehicles to bring out about 1,000 people. Rescuers were working out of a staging area along Highway 71 in Bossier Parish on Thursday. Using boats and trucks high enough to drive through the water, they went through the community evacuating people from their homes.

Many residents brought with them dogs and cats as they fled. Two men could be seen in knee-deep water trying to secure horses in the muddy brown waters.

Rain also pummeled parts of Oklahoma, Texas, Arkansas, Tennessee and Mississippi.

In southern Arkansas, heavy rainfall prompted the closure of some schools and roads, and forecasters say the deluge will continue there for the rest of the week. Meteorologists with the National Weather Service say officials have reported water rescues and evacuations near Dermott, Arkansas, as water rises in low-lying areas. More than 14 inches of rain had fallen as of Thursday morning in Chicot and Ashley counties in the southeast corner of Arkansas.

In west Tennessee, schools shut down early and roads were closed Thursday because of flooding caused by heavy rain.

The National Weather Service says 3 to 10 inches of rain has fallen in counties along the Mississippi River in western Tennessee, eastern Arkansas and northern Mississippi since late Tuesday, flooding roads, parking lots and fields. The flood threat is expected to continue into Friday, as another 1 to 3 inches of rain could fall in the Mississippi Delta region, meteorologist Scott McNeil said.

One weather-related drowning was reported in both Oklahoma and Texas earlier this week.

In Louisiana, officials late Wednesday said a 63-year-old man died when a car was swept off a flooded road. Mike Steele, a spokesman for the Governor's Office of Homeland Security and Emergency Preparedness, said a 22-year-old man and a 6-year-old girl in Ouachita Parish have also been confirmed dead.


Associated Press reporters Bill Fuller and Chevel Johnson reported from New Orleans. Associated Press reporter Michael Kunzelman in Baton Rouge contributed to this report.