August in Havana is a mounting wave of heat—so consuming, the sun so piercing, it can warp your sense of reason. Tempt you to surrender. Make you flirt with insanity. The pained faces around you are covered in grimy sweat, a haze of resignation in the eyes. Here or there a woman fans herself, perhaps with some ladylike, store-bought thing, but more often with a stray scrap of cardboard. Inside, heat radiates from every surface, the temperature rising as the torridity soaks deeper into the concrete walls. Outside is worse. Few dare venture into the scorching light.