Can heavy rain cause a backup in the house with a grinder pump?

Question

I know nothing about grinders and this is a new house that sits down below the street. If the electricity should fail during a storm and I don't use the water system, can heavy rain run into the tank and fill it causing the toilets and drains to back up?

How big usually are these holding tanks?

Answer 1

The answer here is Yes. How large such tanks and pumps are is dependant on the home. Consider an apartment building also uses such tanks and pumps. Rain, is water, and water is a force of Nature. It does as it wills when there is enough to alter the course of rivers, the shape of land or flatten an area, destroying all that was, before it came. Such is the will of Nature.