The neighbors let their yards flood and it caused all sorts of problems.

I dumped $30,000 on home repairs a year ago, largely due to foundation issues. That was the second lift and repair in the last 20 years. Black clay is evil.

The neighbor behind me (white car in driveway) filled their yard. It now runs off into mine. I have a catch basin at the corner of their yard to deal with it. My other two catch basins are at the fence with the other neighbor behind me. She's elderly and I haven't see her in the back yard in more than 10 years. Her yard has standing water. It soaks through the clay and percolates up into my catch basins. I can actually watch the water bubble in.

It hasn't rained since yesterday afternoon and my pump is still cycling every few minutes to remove water leaching in from the clay.