Veissi voiced support for legislation pending in Congress that would delay the increases, and, in the interim, called on the Federal Emergency Management Agency (FEMA), which administers the National Flood Insurance Program, to convene a summit to develop a longer-term affordability solution.

On the other hand, Rep. Randy Neugebauer, R-Texas, chairman of the Subcommittee on Housing and Insurance of the House Financial Services Committee, said there "has been a lot of misunderstanding surrounding the implementation" of the law, and "homeowners are confused and, in some cases, scared about potential rate increases."

For instance, Neugebauer said the committee has looked into complaints about exorbitant flood rates for policyholders who have been re-mapped, where premiums are believed to increase because of Sec. 207 of the law, the Biggert-Waters Act.

He said FEMA has not made final determinations on these "Sec. 207 properties–and in many cases maps are still two years away from being approved by local communities and finalized by FEMA."

Moreover, Neugebauer said, after more than a decade in Congress, "if I have learned anything, it is that the federal government does a terrible job of underwriting and pricing risk. And that has very real consequences for taxpayers who end up footing the bill for the government's failures."

Craig Fugate, FEMA administrator, testified that, "By statute and design, the NFIP was not actuarially sound."

He said the NFIP collects more than $3.5 billion in premiums annually, but estimates that an additional $1.5 billion is needed from subsidized homeowners to make the program solvent. He said that because of subsidies and such catastrophic flooding events as Hurricane Katrina and Superstorm Sandy, the program now owes the federal government $24 billion.

Fugate said the NFIP cannot withstand another Katrina or Sandy event without additional borrowing. He said it has only $6.4 billion left to borrow before asking for more borrowing authority.

"Even with the increases in premiums, you are not going to see the NFIP debt retired anytime soon," Fugate said.

But Michael Hecht, president and CEO of Greater New Orleans, Inc. (GNO) painted a different picture. Hecht said he was testifying not only on behalf of GNO, but also for the Coalition for Sustainable Flood Insurance, which now represents nearly 200 business and trade associations and local governments in 27 states across America.

"We are dealing with a problem of profound unintended consequences," Hecht said, adding that a "three-way confluence of the B-W Act, incomplete FEMA maps that artificially inflate risk, and questionable actuarial calculations has led to premium increases of up to 3,000 percent and more, including massive rate increases for policyholders who have built as the government told them and have no history of flooding."

"These clearly unaffordable premium increases are not limited to properties with severe repetitive loss and wealthy beachfront homes: primary residences of all income levels that have never flooded are being negatively impacted," he added.