It is a common misconception that hydroplaning is more likely to occur when it is raining heavily and there is a great deal of water pooling on the road. In actuality, the first ten minutes of a light rain are the most dangerous because the rainwater mixes with the oil that spills or leaks onto the roadway during dry weather. As the rain continues to fall, it washes away the oil and the roadways become less slippery. Truck drivers should use extreme caution during the initial stages of a rainstorm and take steps to avoid hydroplaning.