How to say “When the storm hit, the sump pump kicked in just before the water reached the boxes on the floor.” in Japanese
In Japanese
嵐になったとき、床に置いた箱に水が届く直前に排水ポンプが動きだした。
Arashi ni natta toki, yuka ni oita hako ni mizu ga todoku chokuzen ni haisui ponpu ga ugokidashita.