The Detroit metro flood on August 11 may end up being a billion-dollar disaster, according to initial damage assessments. 

(RECAP: The Detroit Metro Flood)

Monday afternoon anywhere from 4-7 inches of rainfall hammered parts of the metro. Between one-third and one-half of homes in the hardest hit areas were damaged in the flood, amounting to over 34,000 structures, according to the Detroit Free Press. 

City officials in the hard-hit suburb of Warren estimated 18,047 structures were damaged, including one-third of its homes, with a total value of $1.2 billion.      

An average claim for water damage, however, ranges from $20,000 to $25,000. Unfortunately, a typical homeowners insurance policy does not cover flood damage, so there will be a large number of uninsured homes with at least basement flood damage. 

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The city of Warren is also on the hook for damage to its police department, community center, district court, and the towing bill of an estimated 1,000 vehicles that were flooded and abandoned. 

Keep in mind that is just one flooded suburb's toll.

Around 40 percent of Dearborn homes, 50 percent of Ferndale homes and 75 percent of Huntington Woods homes were damaged, according to the Detroit Free Press.

A comprehensive total flood damage estimate from all of southeast Michigan is not yet available. Damaged infrastructure, including crumbling roads and burst pipes will only add to the recovery cost. 

In 2013, there were nine separate billion-dollar U.S. weather disasters, according to NOAA's National Climatic Data Center. Two of these involved flooding: The Colorado flooding in September (estimated $2 billion) and heavy flooding in parts of the Midwest, including Chicagoland, in mid-April (estimated $1 billion). 

Dating to 1980, there have been 19 separate billion-dollar non-tropical flood events in the U.S., according to NOAA/NCDC. Adjusted for 2013 dollars, the infamous Great Flood of 1993 in the Midwest is the costliest, with an estimated $34 billion in damage.

MORE ON WEATHER.COM: The Detroit Flood of August 2014