Aerial images of Clairmarais, a flooded town in northern France, where house are surrounded by water. Floodwaters have begun to recede in the Pas de Calais region, which is still on red alert, but many towns are still under water, two days after the second episode of exceptional flooding in two months. (COMPLETES VIDI349C9NH_EN, VIDI349E4VH_EN, VIDI349G9XT_EN and VIDI349H7TJ_EN) AERIAL SHOTS OF CLAIRMARAIS