Unseasonably warm and dry March leads to storm forecast in NSW and Queensland.

Bureau of Meteorology expects a second East Coast low causing showers, thunderstorms, and strong winds.

Specific areas like Sydney, the Blue Mountains, and Illawarra are predicted to face heavy rainfall and potential flash flooding.

National data for March indicates above-average temperatures and rainfall, continuing a pattern of unusual weather.

Australia's recent summer ranks as the third-hottest on record, while 2023 sets a global record for heat.

Climate change is linked to these extreme weather patterns, with expectations of more intense rain and fewer light rain events.