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 then, Milwaukee still fares worse when comparing specific crime types to the national average (e.g., homicide, rape, robbery); only aggravated assaults occur less frequently in Milwaukee than the national average. The Milwaukee Police Department's Gang Unit was reactivated in 2004 after Nannette Hegerty was sworn in as chief. In 2006, 4,000 charges were brought against suspects through Milwaukee's Gang Unit. In 2013 there were 105 murders in Milwaukee and 87 homicides the following year. In 2015, 146 people were killed in the city. In 2018, Milwaukee was ranked the eighth most dangerous city in the US. Milwaukee currently ranks as