Intense rainfall spells big trouble if your foundation is not up to snuff. Architect Leigh Jerrard knows of a house that slid right into the street after a blocked street gutter redirected a few days of heavy rain onto the property. "If that house had a good foundation it would have survived." says Jerrard.
If you know you have foundation issues, says Tom Silva, you have to be especially careful to keep water away. Grade away from the house, and keep gutters clean to keep them from overflowing and pooling water at the foundation. If necessary, put in a French drain to direct the water to a storm drain. And install a sump pump if your basement fills often.