Here is a graph of the Fannie Mae mortgage serious delinquency rate and the unemployment rate since 1998 (ht @CharlieAllievo).
For the last two recessions, the delinquency rate and the unemployment rate moved in the same direction.
However, there were significant differences between the two periods. During the housing bust, many homeowners had little or no equity – or even negative equity – when prices started falling. If they lost their jobs, they were unable to pay their mortgage.