This is the bizarre moment a 'ghost' clothes rack was blown down the street during a storm in Thailand.

Footage shows the clothesline rolling down the pavement on its own, with a resident rushing to chase after it to prevent it from crashing into pedestrians or cars in Chiang Mai province on March 18.

Humid temperatures soared to 34 degrees Celsius before the raging downpour lashed homes causing extensive damage in Chiang Mai province shortly after 3:30pm local time on Saturday.

Officials said that at least 12 people were injured across the city when high voltage power lines collapsed, roofs were dislodged and billboards toppled over.

Electricity was lost across more than half of Chiang Mai, the country's second largest city after the capital Bangkok, while dozens of cars were also damaged.

Emergency workers were still working to restore power to some homes and repair damage on Sunday morning, March 19.

Thailand and other countries in Southeast Asia are approaching their annual monsoon rainy season which sees soaring temperatures followed by powerful rain storms.