When the Weather Changed — Mark Douglas Stafford

It seemed obvious to Ash that if you wanted to know the truth about something you should ask people who actually knew, rather than people with no relevant knowledge or experience. But grownups didn't always see the obvious, even when it was staring them in the face; even when the swollen rivers flooded their banks and the heaving seas lifted all but the biggest boats and smashed them on the rocks. But Ash knew what was coming and wouldn't be caught unprepared; and so did the animals, which is why they came two by two.