Robeson County and portions of Southeast North Carolina and Northeast South Carolina are under a Flash Flood Watch until at least late Thursday evening.

The watch was issued Wednesday by the National Weather Service, which expects between 3 and 7 inches of rain to fall on the region through Thursday night as moisture well north of Tropical Storm Eta moves across the Carolinas. The heaviest rainfall rates are expected to occur late Thursday.

“A Flash Flood Watch means that conditions may develop that lead to flash flooding. You should closely monitor this potentially dangerous weather situation. Be prepared to take action should Flash Flood Warnings be issued for your area, and never drive through flooded roadways,” the watch alert reads in part.

The NWS urges residents are to listen for further flood warnings and alerts, and to be prepared to react to them.

The Lumber River’s water level at Lumberton was recorded at 9.8 feet as of 5:45 p.m. Wednesday, according to the NWS office in Wilmington. The river’s flood stage is 13 feet.

The river is expected to reach minor flood stage, or about 14 feet, Thursday afternoon or evening, said Mike Kochasic, a forecaster at the NWS office in Wilmington.

“That’s if the rainfall amounts pan out, and we think they will,” he said.

The Lumber River could rise to 15 feet on Friday, Kochasic said.

The heavy rain is being caused by three weather systems that are positioned around the Southeast and funneling moisture into the Carolinas, he said. Those systems are a high pressure system off the coast to the east, a cold front to the west and Eta, which was preparing Thursday evening to make landfall in Florida for a second time.

“It’s been a heck of a hurricane season, and we’re looking forward to it coming to an end,” the forecaster said.

Traditionally, the annual hurricane season ends at the end of November, but hurricanes have been known to form in December.

Eta was preparing Wednesday afternoon to skirt past the heavily populated Tampa Bay region in Florida and crash ashore in the coming hours somewhere to the north along the Gulf of Mexico coast.

The storm’s maximum sustained winds remained at about 70 mph off Florida’s west coast as the storm moved northward, according to the National Hurricane Center in Miami. Additional weakening was possible as Eta approaches the coast.

Forecasters had posted — but later discontinued — a hurricane watch for a 120-mile stretch that includes Tampa and St. Petersburg. Eta had briefly attained hurricane strength Wednesday morning but then weakened. Subsequently, a tropical storm warning was issued for the same general area.

The storm has been in the Gulf of Mexico since crossing over South Florida on Sunday. At 7 p.m. Wednesday, Eta was located 45 miles west of St. Petersburg and was moving north at 12 mph, the hurricane center reported.

The Tampa Bay region is home to more than 3.5 million people across five coastal counties. No mandatory evacuations were immediately ordered but authorities began opening shelters for anyone needing them. No serious damage or flooding was immediately reported.

Tampa Mayor Jane Castor said special care is taken at shelters to protect people from the coronavirus, such as social distancing, and suggested people bring their own masks.

“Everything will be done to make sure all of our residents are safe,” Castor said.

The forecast prompted school officials in Pinellas and Pasco counties, which includes St. Petersburg, to send students home early Wednesday. Both counties announced schools would remain closed Thursday, as did neighboring Hillsborough County.

The Florida Highway Patrol closed the Sunshine Skyway Bridge that links Pinellas and Manatee counties because of high winds. Tampa International Airport tweeted that it would suspend operations at 3 p.m. Wednesday.

In Pasco County, officials set up four do-it-yourself locations for people to fill sandbags. In Tampa, the Busch Gardens theme park announced it was closed Wednesday and several Veterans Day events in the area were canceled.

Florida Gov. Ron DeSantis issued an expanded emergency declaration to include 13 counties along or near the Gulf coast, adding them to South Florida counties. DeSantis also asked for an early emergency order from the Federal Emergency Management Agency to free resources needed to tackle the storm.

U.S. Sens. Marco Rubio and Rick Scott, who represent Florida, sent a letter to President Donald Trump in support of DeSantis’ request.

“The 2020 Atlantic hurricane season has been particularly challenging due to the number and severity of storms, as well as the unique difficulties presented by the COVID-19 pandemic,” the Republican senators wrote.

A coronavirus testing site at Tropicana Field was also closed Wednesday.

The hurricane center said “life-threatening storm surge” is possible early Thursday, and forecasters advised residents to heed warnings from local officials. Tropical storm-force winds are expected in the area by late Wednesday.

Forecasts call for more rain from the storm system over parts of already drenched South Florida.

“Never seen this, never, not this deep,” said Anthony Lyas, who has lived in his now-waterlogged Fort Lauderdale neighborhood since 1996. He described hearing water and debris slamming against his shuttered home overnight as the storm crossed Florida.

The storm first hit Nicaragua as a Category 4 hurricane and killed at least 120 people in Central America and Mexico, with scores more missing. It then moved into the Gulf of Mexico early Monday near where the Everglades meet the sea, with maximum sustained winds of 50 mph.

There was nowhere for the water to go across much of South Florida, which had already experienced nearly 14 inches of rain in October.

Eta hit land late Sunday as it blew over Lower Matecumbe, in the middle of the chain of small islands that form the Keys, but the heavily populated areas of Miami-Dade and Broward counties bore the brunt of the fury.

It was the 28th named storm of a busy Atlantic hurricane season, tying the 2005 record for named storms. And late Monday, it was followed by the 29th storm — Theta.

The hurricane center said Theta broke the record of 28 named storms in 2005. Theta was centered Wednesday afternoon about 670 miles southwest of the Azores, bearing top sustained winds of 60 mph as that system moved east-northeast at 10 mph.