More than a year after Hurricane Sandy’s waters receded, an “onslaught” of litigation is now slamming into the federal court with jurisdiction over the storm’s most heavily affected areas.

As of early February, more than 800 Sandy-related cases—most disputing insurance claim denials or alleged underpayments—have been filed in the Eastern District, which includes the outer boroughs of New York City and Long Island, areas that endured the brunt of the nation’s second-costliest weather disaster after Hurricane Katrina.