For people who live in high rainfall areas, it is necessary to have a proper drainage system that directs water away from the foundation. The question commonly asked is whether rainwater can cause substantial damage to the foundation. The answer to the question is yes, primarily if it's not controlled or redirected somewhere else. Repairing a foundation is expansive, and it usually takes some time. That's why you should have a professional inspect the foundation if you suspect there might be issues with the DrainageDrainage.