Explosion Proof Motor Sunk in Fresh Water

Hello Everyone,

We were installing Surface Aerators on a lagoon filled with water (to be used later for Industrial waste water treatment).
unfortunately, one Surface Aerator flipped and sank in the water along with the motor (we were just positioning the equipment, we did not run the motor).

We were able to bring the Surface Aerator back, however, the motor is completely soaked!!
What steps we need to make before we start the motor again? how to make sure the motor is completely dry?

below are some details of the motor:
Output: 110 kW
Enclosure: IP55 (TEFC-XP)
Protection: PTC probes
Notes: Explosion proof motor Eexd II BT4

any help/feedback will be greatly appreciated!!