Pumping Water from a unnatural waterway into a natural waterway and nuisance.

Small town - 500 people. I live on a corner. Neighbor across the street pumps water constantly out of his basement. He has a broken tile on his property that he won't fix. Last summer he began pumping the water out of his basement into the middle of the intersection in from of my house and my neighbor's. He has extension hoses attached to each other. He has at least 5 sump pumps running. It is not unusual for him to have 2 to 7 foot of water in his basement. I have a mud, fly, mosquito fest going on in the front of my house in the summer. He is still pumping water, so I now have an ice pond. I only have 1 entrance to my home - the path of the pumped water. I have never had water in my basement until this summer. He was pumping water and the water was seeping in my basement . This caused damage to my wood floor and drywall which my insurance company will not fix because I do not have flood insurance. I do not live in a floodplain, I live on a hillside and do not require flood insurance. School kids walk in front of my house and the garbageman must cross the ice. My husband fell today. He was not hurt. The tires on our vehicle have actually been frozen to the ground. Which means we can only use 1 vehicle for 2 jobs. My neighbor who is also affected by the nuisance, is retired and on a fixed income. He never got water in his basement until the pumping began. He too has damage that his insurance company won't fix because he too does not have flood insurance. He has damage in his basement and the water runs into his garage causing the overhead doors to freeze shut. We have complained to our mayor who said there is nothing we can do about it. He said my house has a natural waterway in front of it. I explained to him that if God put the water into the natural waterway I would have to deal with it, but it's my neighbor and he can't pump water from an unnatural waterway into a natural waterway. May I add that my neighbor that pumps water has a HUGE moat around his house. My neighbor and I have also complained to our town board. I could not sell my house even if I wanted to. Who would pay me what my house is worth? I believe it is now time to take legal action. Please advise soon. More rain and snow is on the way.