Depending on the circumstances of your accident, a variety of parties may be liable for your injuries and losses. In the end, it typically depends on what caused the hydroplaning: If a trucker was speeding or driving too fast for weather conditions, they could be found responsible for the accident and your resulting injuries. Similarly, the trucking company may also be held accountable under the theory of vicarious liability. If the hydroplaning accident happened because of improperly maintained or repaired tires, negligent maintenance may be to blame. This may be the fault of the trucking company or a third party maintenance company hired by the fleet owners. If the accident occurred due to defective tires or treads that caused the truck to hydroplane, a tire manufacturer can also be held liable.