In aquaplaning, a layer of water forms between the road and the tire, so that the grip of tires on the road is lost. Whether it comes to aquaplaning, depends on the amount of water, the speed of the vehicle and the tire tread. The faster the vehicle drives, the less water the tires can displace. Or: the more water there is on the road, the slower you should go to avoid aquaplaning.
Die Lenkung wird schwergängig
There is no reason that the steering could become heavier if the vehicle "floats on the road".