Marjories's Vacation by Carolyn Wells

During August the weather became excessively hot. Grandma Sherwood managed to keep the house cool by careful adjustment of awnings, blinds, and screens, but out-of-doors it was stifling.

Midge and Molly did not mind the heat much, and played out of doors all day, but Stella wilted under the sun's direct rays, and usually her mother kept her indoors until the late afternoon.