By JEANNINE AVERSA
Associated Press

WASHINGTON - U.S. home foreclosures and late payments set records over the first three months of the year and are expected to keep rising.

The latest snapshot of the mortgage market showed that the proportion of mortgages that fell into foreclosure soared to 0.99 percent in the January-through-March period. That surpassed the previous high of 0.83 percent over the last three months in 2007.

The report by the Mortgage Bankers Association also found that more homeowners slipped behind on their monthly payments.

The delinquency rate jumped to 6.35 percent in the first quarter, compared with 5.82 percent for the three months earlier. Payments are considered delinquent if they are 30 or more days past due.

Both statistics were the highest on record going back to 1979.

Jay Brinkmann, the association's vice president of research and economics, said the slump in house prices was the biggest factor for rising foreclosures and late payments.

With prices expected to keep dropping, foreclosures and late payments "are going to continue to go up" in the months ahead, he said.

Homeowners with tarnished credit who have subprime adjustable-rate loans took the hardest hits. Foreclosures and late payments for these borrowers also swelled to all-time highs in the first quarter.

The percentage of subprime adjustable-rate mortgages that had started on the foreclosure process climbed to 6.35 percent from a previous high of 5.29 percent.

Late payments rose to 22.07 percent from 20.02 percent, the previous high.

More problems also cropped up with loans to more creditworthy borrowers.

The percentage of such loans falling into foreclosure was 0.54 percent, compared with 0.41 percent at the end of last year. Late payment rose to 3.71 percent, compared with 3.24 percent.

The numbers were higher for prime borrowers with adjustable-rate mortgages. The proportion of those loans falling into foreclosure jumped to 1.55 percent from 1.06 percent. The delinquency rate rose to 6.78 percent, compared with 5.51 percent.

California, Florida, Nevada and Arizona accounted for 89 percent of the total increase in new home foreclosures, he said. Those are places where prices have fallen sharply and there was a lot of home building, creating too much supply, Brinkmann said.