Fewer Tampa Bay area homes were struck by foreclosure from March to April, but mortgage default numbers soared 44 percent when measured year over year. The firm RealtyTrac reported 6,489 foreclosure filings in Pinellas, Pasco, Hillsborough and Hernando counties in April, a 6.3 decline from the 6,926 filings in March. The region came in 31st in terms of foreclosures, an improvement over its 23rd national ranking in March. But mortgage defaults have continued to pile up the past year: In April 2008, the region reported 4,494 foreclosure cases. The county-by-county breakdown for April 2009 is as follows: Pinellas, 1,662; Pasco, 1,057; Hillsborough, 3,249; and Hernando, 521.