Everything is in a controlled environment or in balance. Improper balance could result in a fire leading to damage of your pwc or personal injury. Leaking fuel lines, carbs or gas tank may give combustion that necessary fuel to start a fire. This linked with an electrical short can cause damaging results. Proper and regular maintenance along with a pre ride check can avoid an area of imbalance.
Watercraft are equipped to carry a fire extinguisher.
Fire extinguishers are designed for small fires before they reach larger proportions. Most extinguishers are labeled for A, B and C class fires and are classified as multi-purpose. An extinguisher is classified with a rating number. Be familiar with the type of extinguisher you carry. Most extinguishers are to be used by aiming the nozzle at the base of the flames, pressing a button or pulling a trigger then moving horizontally back and forth covering the area of fire until extinguishment is expelled or fire is completely out.