This morning (actually noon), the fans in the attic woke me up. I haven't heard that noise in so long that it sounded alien to me. They're set to start working when the temperature in the attic reaches 80 degrees. Believe me, the temperature outside is nowhere near 80, more like upper 60s, but the days are getting longer, so the warmth has a chance to build up.
I promptly trotted all of the hibiscus, mandevilla, clivia, and brugmansia pots out of the solarium into the garden.