What you need to know about droughts: Why they happen and how they are defined
Most Australians will be familiar with the concept, some very familiar of late.
2018 has been the fourth-driest April to June since the Bureau of Meteorology
started taking records back in 1900.
Australia, droughts of the late 20th and early 21st centuries have been found
to be the worst in the past 400 years, and droughts are expected to become more
prevalent in the future.
Not all droughts are created equal. There are four main interconnected types.
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(ABC NEWS 1/8/2018)