Milwaukee both January 17, 1982 and February 4, 1996. The 1982 event, also known as Cold Sunday, featured temperatures as low as in some of the suburbs as little as to the north of Milwaukee. In the 1990s and 2000s, Lake Michigan experienced large algae blooms, which can threaten marine life. Responding to this problem, in 2009 the city became an "Innovating City" in the Global Compact Cities Program. The Milwaukee Water Council was also formed in 2009. Its objectives were to "better understand the processes related to freshwater systems dynamics" and to develop "a policy and management program aimed at
Milwaukee "inner-ring" suburbs. In the 1920s Chicago gangster activity came north to Milwaukee during the Prohibition era. Al Capone, noted Chicago mobster, owned a home in the Milwaukee suburb Brookfield, where moonshine was made. The house still stands on a street named after Capone. By 1960, Milwaukee had grown to become one of the largest cities in the United States. Its population peaked at 741,324. In 1960, the Census Bureau reported city's population as 91.1% white and 8.4% black. By the late 1960s, Milwaukee's population had started to decline as people moved to suburbs, aided by federal subsidies of highways. They