From the Today Show:
The six scariest real estate markets
Stockton, Calif.
Stockton has the highest rate of foreclosures in the nation...Unemployment is a whopping 10 percent, almost double the national average of 5.2 percent.
...
Some people are simply walking away from their homes because they're spending too much on gas to commute back and forth to work in the Bay Area, plus their homes are no longer worth what they paid for them. Instead, they just move closer to work and rent rather owning. Local realtors report that homes have become vandalized or burglarized for copper plumbing or wiring, cabinets and other re-salable fixtures. In some areas of Stockton, there are more than five homes on a single street that are abandoned. Homeless people are squatting in homes, even without power or water, just to find shelter.
Sacramento, Calif.
Home prices in this area more than doubled between 2000 and 2005, setting Sacramento up for a hard fall. Since last year, the price per square foot in Sacramento dropped 29.8 percent to $161, according to the real estate data company Radar Logic Inc.