Does SM4 flood?

SM4 4NR up to High SM4 4NS up to High SM4 4PA up to High SM4 4RY up to High SM4 4SJ up to High SM4 6AB up to High SM4 6BF up to High SM4 4BZ up to Medium SM4 4EX up to Medium SM4 4JJ up to Medium SM4 4JN up to Medium SM4 4JP up to Medium SM4 4JX up to Medium SM4 4LF up to Medium SM4 4NN up to Medium SM4 4NP up to Medium SM4 4NX up to Medium SM4 5JD up to Medium SM4 6AU up to Medium SM4 4BY up to Low SM4 4JR up to Low SM4 4JS up to Low SM4 4JW up to Low SM4 4JZ up to Low SM4 4LD up to Low SM4 4LG up to Low SM4 4LR up to Low SM4 4LS up to Low SM4 4LU up to Low SM4 4LX up to Low SM4 4NU up to Low SM4 4NW up to Low SM4 4NY up to Low SM4 4RX up to Low SM4 4RZ up to Low SM4 4SG up to Low SM4 4SS up to Low SM4 4TQ up to Low SM4 4TS up to Low SM4 5PR up to Low SM4 5QD up to Low SM4 5QH up to Low SM4 5QS up to Low SM4 6AA up to Low SM4 6AL up to Low SM4 6AN up to Low SM4 6AW up to Low SM4 6FB up to Low SM4 6JB up to Low SM4 6LP up to Low SM4 6LS up to Low SM4 6LT up to Low SM4 6LZ up to Low SM4 6NH up to Low SM4 6NX up to Low SM4 6NY up to Low SM4 6PD up to Low SM4 6PF up to Low SM4 6PG up to Low SM4 6PQ up to Low