When the air gets heavy and dark clouds drift low over the fields of Grandma's farm, her frightened granddaughter hides under the bed. "This is Thunder Cake baking weather!" calls Grandma, and a real Thunder Cake must reach the oven before the storm arrives. So the two hurry to gather ingredients from around the farm, trying to stay one step ahead of the approaching thunderstorm. Patricia Polacco's bright illustrations bring life to her childhood memory of how her grandma helped her overcome this universal childhood fear.