One Dark Night by Hazel Hutchins, illustrated by Susan Kathleen Hartung

From chapters.ca:
One dark night, Jonathan watches from his window as a summer storm rumbles in the distance. Outside, a stray cat searches the bushes for something. As lightning flashes and the first heavy raindrops begin to fall, Jonathan worries: will the stray cat find what she's looking for before the thunderstorm is upon them? Young listeners will delight in the drama of a summer storm come to life - and breathe a sigh of relief at the story's reassuring ending.