A sump pump has one job, and a failed float switch, a clogged inlet, a worn motor or a power outage can end it during the worst weather. The water that follows is groundwater or runoff, so the crew treats it as contaminated until the source and the meters say otherwise.
Why pumps fail in storms
Heavy rain raises the workload exactly when the pump is most likely to stall. Massachusetts projections show more precipitation each year arriving in fewer events, so a pump that handled light rain may meet one hard downpour that it cannot clear.
- Check the float switch and the discharge pipe for clogs.
- Test the backup battery or second pump each season.
- Keep valuables off floors in rooms the pump protects.
- Photograph the water level before anything is moved.



