How long can a concrete pool be empty in south Florida and can it possibly lift up from the ground?

In South Florida, a concrete pool can typically be empty for a few weeks without significant issues, but prolonged emptiness—especially over a month—can lead to structural problems. The risk of the pool lifting, known as hydrostatic uplift, increases if groundwater levels are high, as the buoyant force can act on the empty pool. To mitigate this risk, it's advisable to monitor groundwater levels and consider draining the pool only during dry seasons or with proper precautions.