Storm & Flood Damage Recovery in Stonecrest, GA

That is clay-rich soil holding water against the buried wall rather than releasing it. On a slope the uphill side stays saturated long after the surface looks dry, so the wall is under pressure well past the storm. It also means the timing of seepage tells you little about when the water arrived. A functioning footing drain with somewhere to discharge is what changes it; sealant applied to a wall under pressure does not hold.

On this soil that is a real and common effect, since clay sheds most of what falls on it and a modest regrade uphill can redirect a significant volume. Document it during rain rather than describing it afterward: photographs and video with dates showing where water enters the property. That record is what makes the conversation productive whether the remedy ends up on your lot or upstream of it.

Not inherently, and it does demand that the drainage actually work rather than merely exist. Newer construction includes a footing drain and a sump, which handles the ordinary case. What matters is whether that drain discharges somewhere it can actually go, and whether the excavation intersected rock in a way that concentrates flow. Both are worth confirming before the lower level is finished rather than after.