Does SY4 flood?

SY4 1BP up to High SY4 1BS up to High SY4 1BT up to High SY4 1BU up to High SY4 1BW up to High SY4 1ED up to High SY4 1EH up to High SY4 3HW up to High SY4 3NE up to High SY4 3RN up to High SY4 3RP up to High SY4 4AG up to High SY4 4AH up to High SY4 4LR up to High SY4 4QU up to High SY4 4RS up to High SY4 4SY up to High SY4 5HG up to High SY4 5NU up to High SY4 5QF up to High SY4 5RP up to High SY4 1AJ up to Medium SY4 1AP up to Medium SY4 1AW up to Medium SY4 1BJ up to Medium SY4 1BL up to Medium SY4 1EQ up to Medium SY4 4SN up to Medium SY4 5SH up to Medium SY4 5SX up to Medium SY4 1DA up to Low SY4 1DT up to Low SY4 1EE up to Low SY4 1ER up to Low SY4 1EX up to Low SY4 2BT up to Low SY4 3HH up to Low SY4 3JS up to Low SY4 3RD up to Low SY4 3RL up to Low SY4 3SD up to Low SY4 4BA up to Low SY4 4BS up to Low SY4 4EH up to Low SY4 4HR up to Low SY4 4HS up to Low SY4 4LH up to Low SY4 4PU up to Low SY4 4QL up to Low SY4 4SE up to Low SY4 4TB up to Low SY4 4UD up to Low SY4 5DU up to Low SY4 5EX up to Low SY4 5NE up to Low SY4 5NN up to Low SY4 5NQ up to Low SY4 5QG up to Low SY4 5TU up to Low SY4 5HF up to Very low