A rendering of work for the Water Tank Project, featuring art by Ed Ruscha

Word Above the Street, a New York-based non-profit organisation, plans to transform 300 rooftop water tanks across New York City into works of art to raise awareness on the global water supply. For 12 weeks during the spring and summer of 2013, the Water Tank Project will host works by artists including Ed Ruscha, Lawrence Weiner, Tony Oursler, Marilyn Minter and Carrie Mae Weems, as well as rapper Jay-Z.