NEW ORLEANS — At the same time they are venting their fury on BP over the Gulf of Mexico spill and its calamitous environmental effects, Louisiana politicians are rushing to the defense of the oil-and-gas industry and pleading with Washington to bring back offshore drilling — now.

As angry as they are over the disaster, state officials warn that the Obama administration's temporary ban on drilling in the Gulf has sent Louisiana's most lucrative industry into a death spiral.

They contend that drilling is safe overall and that the moratorium is a knee-jerk reaction, akin to grounding every airplane in America because of a single crash. They worry, too, that the moratorium comes at a time when another major Louisiana industry — fishing — has been brought to a standstill by the mess in the Gulf.

"For (goodness) sake, don't finish us off with a moratorium," Louisiana Attorney General Buddy Caldwell said this week.

Meanwhile, a government task force of scientists said that before BP cut and capped the blown-out well a week ago, it may have been spewing as much as 2.1 million gallons of oil per day — or twice as much as the government's previous worst-case estimate. The bigger number is just an estimate, and scientific teams are still coming up with more complete numbers.

The oil-and-gas industry is the backbone of the Louisiana economy, bringing in billions of dollars in revenue for the government and accounting for nearly one-third of the nation's domestic crude production.

It took a heavy blow when the government imposed a six-month offshore drilling moratorium in the wake of the spill that has sent tens of millions of gallons of oil into the Gulf in the biggest environmental disaster in U.S. history. The government imposed the ban while it reviews the safety of deepwater drilling in light of the BP disaster.

Louisiana lawmakers have railed against the moratorium, saying it could put more than 100,000 people out of work, shutter businesses and destroy livelihoods. A bill asking the administration to shorten the moratorium passed the Legislature unanimously.

But persuading the administration to take such action could prove to be extraordinarily difficult at a time when globs of oil are fouling marshes and beaches, images of oil-soaked birds are a fixture in the news and no apparent end to the spill is in sight.

Interior Secretary Ken Salazar has acknowledged the potential damage to energy companies and their employees and promised a Louisiana senator the administration would demand that BP compensate businesses for their losses.

The moratorium put a halt to the 33 deepwater exploratory rigs in operation in the Gulf in addition to all new deep-sea drilling permits. Platforms that are already producing oil along with rigs in shallow waters are allowed to remain in operation.

"Every one of these deepwater wells employs directly hundreds of people and indirectly thousands," said Sen. Mary Landrieu of Louisiana. "This is one company. This is one well. It's a terrible situation and no one is making light of it, but what I'm saying, as strongly as I can, to this president is the economic analysis is devastating to many companies, thousands of companies.

BP hopes that it can stem the flow of oil soon and remove some of the heat that has been put on the company and energy industry by politicians, the American public and investors, who have dumped BP stock and driven its price down to the lowest level in 14 years out of fear that the spill could spell the company's ruin.

BP is capturing more oil from the bottom of the sea each day, and expects to siphon even larger quantities by early next week once more heavy equipment arrives. Coast Guard Adm. Thad Allen, who is overseeing the crisis for the government, said BP could be taking in 1.17 million gallons a day by next week, up from the current daily rate of 630,000.

Meanwhile, President Barack Obama on Thursday consoled relatives of the 11 workers killed in the Gulf oil spill disaster, acknowledging their "unimaginable grief" and personally assuring the families that he will stand with them.

One man who lost a son asked Obama to support efforts to update federal law limiting the amount of money the families can collect.

"He told us we weren't going to be forgotten," said Keith Jones of Baton Rouge, La. "He just wanted us to know this wasn't going to leave his mind and his heart."

The meeting at the White House with the families came on Day 51 of the disaster. Obama also updated congressional leaders from both parties on the response to the spill, and the top federal official overseeing the crisis invited BP executives to meet next week with Obama, their first meeting with the president since the rig exploded and sank.

Amid the grandeur of the Red Room and the adjacent State Dining Room, Obama addressed the grieving families before he worked his way around the rooms, taking as much time as needed to console each family, Keith Jones said. The meeting lasted about 50 minutes and Bo, the Obama family dog, was brought in at one point.

U.S. Geological Survey Director Marcia McNutt, who is coordinating the estimates, said the most credible daily flow rate at the moment is between 840,000 gallons and 1.68 million gallons. Researchers do not have figures for after the cap was installed. "Our scientific analysis is still a work in progress," McNutt said.

At the same time, Gulf Coast leaders are tallying up the economic damage.

Trade groups estimate that the 33 deepwater rigs idled the moratorium employed 5,900 to 9,200 people. Rig workers earn up to $1,800 per week, so that amounts to a loss of tens of millions dollars in salaries. In addition, those jobs support an additional 26,000 to 46,000 industry workers.

"It's going to put us out of business," said Glenn LeCompte, owner of a Louisiana catering company that provides food to offshore rigs. "My payroll probably runs about $150,000 a week. That payroll is going to disappear."

Gulf communities already are seeing the livelihoods of thousands of fisherman, property owners and tourism workers jeopardized by the spill. Fishing and tourism contribute $10 billion to Louisiana's $210 billion economy, while energy contributes $65 billion.

"Those two things, fishing and oil, coexist together and form a way of life down here," said Jefferson Parish Council Chairman John Young.

The Energy Department estimates that 25 million barrels of oil production will be lost in 2011 because of the six-month moratorium. That's less than what the country burns in two days, but production will drop even more if the ban is extended to a year or more, as a number of analysts expect.

Many of the drilling jobs could end up going to Brazil, which recently discovered numerous oil fields off its coast. Brazilian oil company Petrobras wants to tap those fields but lacks the rigs.

"They're licking their chops saying, 'We'll take them'" from the U.S., said industry analyst Collin Gerry.

Barry Graham, general manager of Barry Graham Oil Service LCC, which operates 21 petroleum support vessels from Alabama and Louisiana, said he is hoping to avoid layoffs among his 150 employees.

"It's like sitting here waiting for the storm to approach," he said. "You sit and wait for a hurricane when you get the news it's coming. That's what this feels like — just waiting to get hit."

Associated Press Writers Melinda Deslatte in Baton Rouge, Mary Foster in Port Fourchon, Brian Skoloff in Morgan City, Ray Henry in New Orleans, Harry R. Weber in Houston and Seth Borenstein in Washington contributed to this report. Kahn contributed from New York.