Three years ago, I didn't know my neighbors' names. I knew their cars. I knew roughly when they got home. I knew the couple in 14B had loud arguments on Sunday nights and the man in 7A walked his dog at exactly 6:15 AM. But I didn't know them. And then the flood came. --- It was a minor flood, as floods go. Three days of rain, a drainage system overwhelmed, half the street underwater to ankle depth. Not catastrophic. But enough to break the spell. Maria from across the street knocked on my