Don't sweat it. Air gets in, even though water can't. Water can try to flow past this obstacle, but there's a 100% guarantee it won't. The Georgia Waterproof system comes equipped with a heavily fortified defense against water, because dry feet are happy feet.
Georgia waterproof system
Rubber outsole with EVA midsole
Combined cement and stitchout construction
AMP (Advanced Memory Polyurethane) insole
Anchor Disk by Georgia - provides added heel support