5. Why is the Philippines prone to typhoon? a. Most of the tropical cyclones started out in the Atlantic Ocean where there is warm water. b. Tropical cyclones do not exist in Australia. c. They form over tropical oceans that must be at a temperature of 24-26 degrees. d. Our country is located near the equator. Thus, it is warm in the vicinity of the Philippines, both on land and in the surrounding bodies of water. The temperature of ocean water must be 26.5°C or greater. or NO.