You should never ever empty your pool. Sufficient water levels provide weight to hold a pool in place when heavy rains raise the local water table, according to the FLorida Swimming Pool Association (FSPA). Otherwise, the storm could cause the pool to pop out of the ground and crack tiles. If anything, some experts recommend lowering the level by 1 to 2 ft.
At all possible, shut down the motor & pump then cover with plastic to protect them from the weather.
The FPSA recommends that you put extra cholrine in the pool. This can prevent impurities from building up.
Remove anything from the pool, from toys, floats and pool tools. Also remove any furniture around the pool. If you have a grill near the pool, store it away. Any objects can be used to damage the pool tiles or sides.