Since I moved in back in 2003 the house I live in has lost power only once for an extended period of time. That was about two and a half hours. I know no pump can keep up with over four inches of rain falling in less than half a hour. I need to create a drain in my back yard to funnel more water away from my house.
There are parts of north central Iowa that are flat but where I live it is very hilly. Most of my home town is built on top of a hill. My house is level with the second floor of the elementary school a little ways down the block.