Philly police warning businesses to prepare for mayhem if Eagles win Sunday

Philadelphia is bracing for chaos ahead of the Eagles' NFC Championship showdown against the Minnesota Vikings.

Businesses in northeast Philly received a memo from police advising them to have their security grates locked and secured, and to remove trash cans and other objects from outside their storefronts. Bar owners are also being asked to serve alcoholic beverages in plastic cups and avoid selling takeout bottles.

After the Phillies won the World Series in 2008, the Philadelphia Inquirer reported that "hundreds and hundreds of people jammed the streets" around Frankford and Cottman Avenues and became "increasingly rowdy throughout the night."