Powerful thunderstorms and widespread flooding caused this sinkhole to open up in Milwaukee, Wisconsin.

 A homeowner looks at a sinkhole that appeared outside his Hawaii home after a 6.7 tremblor struck the island in 2006. 
 A bird's-eye view of the giant sinkhole which swallowed a 3-storey building after it opened up in Guatemela City last year.
 A structure is swallowed up after a sinkhole opened up in Guatemala City.

 A sinkhole opens up in Nixa, Missouri.

 Workers inspect a sink hole caused by flooding at the Pacific Cove Mobile Home Park in Capitola, Calif., Friday, March 25, 2011. A powerful storm swept across California flooding part of Capitola, in Santa Cruz County, and forcing dozens of mobile homes residents to evacuate. The storm soaked hillsides along the coast threatening landslides as the rain continues.

 City crews work to attach chains on a City of Houston Public Works dump truck, after it fell into a sink hole caused by a cave-in on Balmforth at Dumfries near Godwin Park, Tuesday, Feb. 8, 2011, in Houston. Officials said the truck was carrying gravel to repair potholes on the street when the road fell out beneath the truck, which fell into the hole backwards. No injuries were reported and the truck was later lifted out by a large crane.

 A Los Angeles fire engine topples over in a sinkhole caused by a burst water pipe.

 A pickup truck is partially buried at the bottom of a 60-foot-deep sinkhole off the southbound lane of a Pennsylvania highway.

 Sinkhole Swallows SUV

 A Tuesday, Sept. 14, 2010 photo provided by the Clackamas Fire District 1 shows Oregon firefighters working to rescue a camel, Moses, who got stuck in a sinkhole 6 to 8 feet deep after he fell in. Firefighters were called by the Oregon City owners of the camel, who have several camels and run a children's ministry. Firefighhters shoveled mud for several hours to free him. A veterinarian said the animal looked unhurt.

 CHEVY CHASE, MD - DECEMBER 3: Utlity workers examine the scene of a car caught in a sinkhole caused by a broken water main, which collapsed part of Friendship Blvd. on December 3, 2010 in Chevy Chase, Maryland. No one was reported injured in the accident. (Photo by Logan Mock-Bunting/Getty Images).

 CHEVY CHASE, MD - DECEMBER 3: A car sits in a sinkhole caused by a broken water main, which collapsed part of Friendship Blvd. on December 3, 2010 in Chevy Chase, Maryland. No one was reported injured in the accident. (Photo by Logan Mock-Bunting/Getty Images)