F Train. 31 degrees. 34 tomorrow. In May. Global warming? Old wife’s tale. . The windows are, unsurprisingly, all open. I hear the F train exit Carroll Street and head south. Evening traffic is still grinding. There is no breeze. Just thick moist darkness and sirens. . I look at a map of Brooklyn on the wall and reckon it would take 5 hours to walk west to east, 10 south to north. Google maps says 2.5 and 4.3. Whatever, I have no plan to do either especially in this heat.