Elizabeth Shreeve: 2 books

In order for Hector to throw his annual winter party, he has to expand his hole to fit all his guests--but a giant pebble is standing in the way. And he's really got to move it when his brother Cosmo--and all of Cosmo's wumblepups--move in for the winter!

One night Hector falls asleep to the sound of rain rat-a-tat-tatting on the roof of his wumblebug hole. And even though the rain has been coming down for days, Hector is not worried. He's safe and snug. But then Hector wakes up to discover his hole is filling up with water fast! Hector is swept out...