Repairing Water Damage Hardwoods

Repairing Water Damage on an Engineered Hardwood Floor
I've seen that an equal combination of vinegar and olive oil rubbed on with a clean cloth would remove white spots on furniture so that might work. I'd suggest being very careful to not leave the floor oily so people won't slip and fall.
Repairing Hardwood Floor Water Damage: A Definitive Guide
As the founder of ServiceMaster by Zaba in Chicago, Illinois, Diana is IIRC certified in both fire and water damage restoration. Her years of experience include working in the field alongside her team helping home and business owners deal with the aftermath of water, fire and mold damage. Diana enjoys sharing her knowledge and making a positive difference in the community.