Tropical Storm Mulan caused severe floods across Northern Thailand as relief agencies battled to evacuate residents.

Footage shows the situation in Chiang Rai province on Friday evening with rescue teams wading through the muddy deluge to hand fresh food and water to stricken locals.

Sandbags were also being used to block the water from spilling into homes and shops.

The country's Meteorological Department said Mulan had weakened to a low pressure cell as it entered Yunnan province in China but the storm has caused widespread heavy rainfall in some of Thailand's northern and north-eastern provinces.

Landslides and blocked roads have also been reported across the region as officials try to reach those affected and move them to safe centres.

The other affected provinces in Thailand include Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Uttaradit, Tak, Phitsanuloke, Loei, Nong Bua Lamphu, Nong Khai, and Udon Thani.