The number of homeowners forced to give up their homes jumped last month as foreclosure filings increased by more than 50 percent compared with June of last year.

One in every 501 U.S. households either lost the home to foreclosure, received at least one foreclosure-related notice or was warned of a pending auction. Bank seizures rose 171 percent.

According to Mark Zandi, chief economist for Moody’s Economy.com, the foreclosure problem is getting worse and will stay with us well into the next decade. “The job market is eroding and homeowners have less equity. Lenders are much less willing to work with you if you’ve got negative equity, and you’re more likely to give up your house if you’re deeply underwater.”

About 53 percent of borrowers with subprime loans, those with poor or incomplete credit histories, will have negative equity in their homes at the end of the year, and the number will rise to 63 percent in 2009, New York-based analysts at Credit Suisse led by Rod Dubitsky said in an April 23 report.

Rising mortgage defaults and auctions of foreclosed properties are adding to a glut of unsold homes and prolonging the housing slump. Efforts by the U.S. Congress to insure as much as $300 billion in refinanced mortgages and save up to 2 million borrowers from foreclosure can work only by “slowing down or reversing home price declines and equity deterioration,” Credit Suisse said.

While foreclosures continue to rise nationwide, efforts in some states to give borrowers more time before losing their homes appear to be working.

In Maryland, where a new law has increased the time to finalize a foreclosure to 150 days from just 15, foreclosure filings dropped by almost 18 percent from last year’s levels. In Massachusetts, which last year passed a similar law, filings dropped almost 3 percent.

Still, the combination of weak housing sales, falling home values, tighter mortgage lending criteria and a slowing U.S. economy has left financially strapped homeowners with few options to avoid foreclosure. Many can’t find buyers or owe more than their home is worth and can’t refinance into an affordable loan.

Economists project 2.5 million homes nationwide will enter the foreclosure process this year, up from about 1.5 million in 2007.