★★ The first light revealed rich blue fog, with wet pavement below. Visibility gave out after four or five blocks, where Broadway angled out of view at Verdi Square. The fog lifted into a cool gray morning, but that was as far as improvements would go. The temperature stopped its climb. In the afternoon, up on the rooftop under a sky of rumpled gray cotton batting, it took a long time to realize that there was no acclimation to be had, and that the coolness had become an outright chill.