Hurricanes are the most violent on Earth. People call these storms by other names, such as typhoons or , depending on where they occur. Only storms that form over the Ocean or parts of the Pacific Ocean are called . The Atlantic season runs from June to November. To be classified as a hurricane, the storm must have continuous of over 250km/h. Hurricanes form only over warm ocean waters near the , where the temperature is at least 26°C and the air is .