One way to ensure that you have a waterproof basement near Baltimore is to install a water-powered sump pump. This backup pump engages if your main sump pump malfunctions, or when power is cut off from your main sump pump, which could happen during a power outage due to a severe storm or heavy rains. Without a backup pump, you risk having to deal with a flooded basement and extensive water damage.
Watch this informative video to learn more about water-powered sump pumps, and to see an animation of how they work to extract water from basements without the need of electrical power sources.