Walter was Worried by Laura Vaccaro Seeger

From Lookybook:
A wild storm creates a riot of emotions for eight children in this typographically imaginative picture book. Walter worries about a darkening sky, while Priscilla puzzles over a mysterious fog, and Shirley is shocked by bright bolts of lightning. Even more children voice their worries and wonders throughout, as their facial features ingeniously display the letters in their names. With multimedia illustrations drenched in colour.