What is the fine-grained topic of the following text: “Beachfront houses should prepare for big swells and possible coastal erosion, especially in areas such as Kingscliffe, The Pass, Clarkes Beach, Main Beach and Belongil, New Brighton and beaches in the south of the Byron Shire (Suffolk and Tallow),” Mr Somers said. Only return the topic.
Preparation for coastal erosion and big swells in specific beachfront areas