Australian travellers are being warned of a dangerous storm cell that is forecast to sweep through several tourist hotspots in South-East Asia.

Tropical Cyclone Kalmaegi is set to hit Vietnam, Cambodia and Laos in the coming days, triggering a Smart Traveller warning to Australians who are either in these countries or heading to them.

"Heavy rain and dangerous winds are expected, which may cause flash flooding and landslides," the website said today.

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"Transport, including airport closures and flight cancellations, along with essential services, may also be affected.

"If you're travelling, contact your airline or travel provider [and] check media for updates and follow the instructions of local authorities

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