I think that one of the main ones most of the time is drought as we have such a dry and hot climate. But currently flooding is an issue, in Tasmania we just had the biggest flood since the 1921 floods (Look it up).
Northern parts of Australia are also prone to tropical cyclones
Explanation: Segregation is the physical separation of peoples on the basis of ethnicity and social custom historically applied to separate African Americans and Mexican Americans from whites in Texas
