Storm Goni has changed course and is now expected to make landfall on Vietnam's south-central coast Thursday, local news reports said.

Meanwhile, Philippines' President Rodrigo Duterte warned of another potentially damaging typhoon approaching the country. Atsani, with gusts of up to 80 kilometers an hour is gaining strength over the Pacific Ocean and is expected to make landfall later this week. 'It's not as powerful as (Goni) but it would cause damage in its path, on the roads and bridges, Duterte said in a televised cabinet meeting.

At 7 a.m. local time (midnight GMT) Tuesday, Goni was around 400 kilometers southeast of Vietnam's Paracel Islands in the South China Sea with winds of up to 75 kilometers an hour, according to the National Center for Hydro-Meteorological Forecasting.

By early Thursday it will be 160 kilometers off the coast with winds of 90 kilometers an hour and expected to make landfall near the beach resort town of Nha Trang before weakening into a tropical depression.

Goni swept across the Philippines' main island of Luzon on Sunday leaving at least 20 people dead and causing volcanic mudflows to bury houses, Reuters reported. It was considered a "super typhoon" when it reached the Philippines with sustained winds of up to 225 kilometers an hour.

Goni - the world's most powerful typhoon to date in 2020 - made landfall in the eastern Philippines' main and most populous island of Luzon, authorities said.

Goni - known as Rolly in the Philippines - caused storm surges, flash floods, power outages and volcanic mudflows that buried houses before weakening as it headed toward Metro Manila, where the capital city's main airport was closed, authorities said.

More than 300 homes and small buildings were buried under rock and mud flows from Mayon Volcano in Albay province in the Bicol region, local disaster officials said.