It's official. For the first time in a decade a La Nina event has been declared by the Bureau of Meteorology.

La Nina events often bring more moisture to Australia and can lead to floods and ferocious cyclone seasons.

There's also an assumption that because of all the rainfall, bushfires will be banished - or at the very least lessened.

But bushfire experts and climate watchers have said that may not be the case. This La Nina could actually lead to bushfires that otherwise wouldn't have occurred.

It's the unexpected and grim worry for Australia's La Nina summer.

"We've seen devastating bushfires during La Nina events," a climate scientist has told news.com.au.

Read the full article on the news.com.au website, featuring Dr Joelle Gergis