In Brooklyn, after a big rain storm in the fall or winter, the winds often pick up quickly and boldly, and, usually at night, blow the borough clean, giving to the streets the invisible squeegee effect that happens to the windshield of a car in a car wash's end-of-the-wash wind tunnel phase. In the city, that kind of wind can make for a mingling of rain water with other liquids, such as oil and gasoline—what hydrologists call non-point source pollution, America's #1 water polluter—and, in this case, what looks a lot like milk, and most likely is milk, due to it being adjacent to a large milk consumption station--i.e., a Starbucks.
