Top five. Full list here 5. New Orleans, La. Many areas of New Orleans are plagued with rats, especially older residences prone to problematic cracks and other small holes through which rats can enter. Even when these holes are plugged, rats can still get in, eating through foam, caulk and wood. And in one tragic 2009 case, rats did more than pester and frighten affected residents. A three-month-old baby's official cause of death was "exsanguination due to destruction of soft tissue secondary to murine activity." In layman's terms, the coroner believed she bled to death after rats repeatedly bit her. 4. Chicago, Ill. Rats also have the run of Chicago, although the city receives some help at decreasing the rodent population from an unexpected source. That assistance comes from coyotes, which are allowed to roam the streets of Chicago as part of a study to see how coyotes behave in an urban environment. Many of the coyotes you might glimpse loping down the streets of Chicago and the surrounding metropolitan area have been captured at one point or another, often as pups but also as adults, and then released with radio collars to track their whereabouts. Since rodents make up a large portion of a typical coyote's diet: Boom, dinner is served. 3. Baltimore, Md. Baltimore's rat problem is bad enough that at one point, rats tunneled so intensely beneath a particular area of pavement that when garbage collectors drove over it, their truck sunk up to its axles. Rats in the vicinity took full advantage of the mishap and swarmed the truck, gorging on the garbage inside. Baltimore also enjoys the dubious distinction of being a hotspot for rat-related research, beginning during World War II and continuing today, much of it carried out at Johns Hopkins University. 2. Boston, Ma. Like the ratty situations in London and Atlanta, Boston's rat problem may very well have been exacerbated by the recession. Improper trash storage and construction projects are another two commonly cited culprits. Regardless of the exact causes involved, the whole issue has Bostonians up in arms, especially considering the fact that between 1995 and 1997, Boston had a rodent-kill program in place that was wildly successful. But the money for that dried up, and rodents have since returned. 1. New York City, N.Y. Incidents of unexpected rat appearances are frequently broadcast out of the Big Apple. Take the KFC/Taco Bell ratscapade of 2007. At a KFC/Taco Bell fast-food outlet located in Greenwich Village, a pack of rats drew big crowds and camera crews after they were discovered nonchalantly scurrying around the main eating area of the restaurant before it opened for the day. Word later got out that they regularly made themselves at home in the food prep area, too. Not pleasant information for frequent patrons, especially when news broke that the restaurant had several past rodent-related violations. It's no wonder that with viral videos like that, some New Yorkers are worried negative coverage will hurt tourism. At least the city's in good company!