THE  south of the ACT is included in a severe thunderstorm warning for damaging winds and heavy rainfall on Wednesday morning.

The Bureau of Meteorology says the forecasted heavy rainfall may lead to flash flooding, with emergency services urging people to move cars under cover, secure loose items and never walk, ride or drive through flood waters.

The bureau says if severe thunderstorms develop in Canberra and Queanbeyan, a more detailed warning will be issued.

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