Wildfires that scorched forests in northern Japan, reportedly the second biggest in over 30 years, have been brought under control after 11 days, officials have said.

Hundreds of firefighters and more than 1,000 military personnel had battled the blazes since late April, as they burned around 1,600 hectares (4,000 acres) across the mountainous Iwate region.

The affected area is almost five times the size of New York City’s Central Park.

At least eight buildings were damaged, and two people suffered minor injuries, according to the Fire and Disaster Management Agency. Thousands of people were evacuated as fires picked up.

Otsuchi town mayor Kozo Hirano told reporters on Saturday that he had been “informed that… the fire had been brought under control” after visiting the area with fire officials.

He credited aerial and ground firefighting operations, as well as heavy rainfall, for containing the flames.

But Hirano said authorities would remain vigilant as there was a possibility that smouldering embers would remain.

Kyodo News described the blaze as Japan’s second-largest wildfire in over 30 years.

Increasingly dry winters have raised the risk of wildfires. Last year, Iwate suffered a separate wildfire that burned 2,600 hectares, the largest in Japan since 1975, when 2,700 hectares were scorched by fire in Kushiro, on the northern island of Hokkaido.

Scientists have long warned that climate change caused by mankind’s burning of fossil fuels will make periods of drought more intense and longer-lasting, creating the ideal conditions for wildfires.

Taiwanese President Lai Ching-te on Saturday announced his arrival in Eswatini — Taipei’s only diplomatic ally in Africa — after an earlier trip was cancelled when several countries revoked overflight permits.

Those various African nations withdrew overflight permission following “intense pressure” from Beijing, one of Lai’s closest advisers said at the time, forcing cancellation of the initially scheduled April 22-26 trip.

Lai on Saturday said only that his initial visit had been “suspended due to unexpected external forces”.

But “after days of secret arrangements by the diplomatic and national security teams, we arrived successfully today (Saturday),” he said in a Facebook post.

“I hope this trip will contribute to even deeper friendship between Taiwan and Eswatini, thanks to closer economic, agricultural, cultural and educational links, as well as promote Taiwan’s international cooperation,” he added.

“The 23 million Taiwanese people have the right to embrace the world and engage with the world,” Lai said in a speech before the Eswatini royal family and assembled dignitaries.

“And no country has the right and no country should ever block Taiwan from contributing more to the world,” he added.

Earlier Saturday, China’s foreign ministry accused Lai of making a “stowaway-style escape farce” that made him “an international laughing stock”.

“No matter how the DPP authorities collude with external forces … it is all in vain and cannot change the fact that Taiwan is part of China,” an unnamed spokesperson said in a statement on the ministry’s website, referring to Lai’s party.

“We urge Eswatini and other individual countries to see clearly the general trend of history … and not pull chestnuts out of the fire for a handful of ‘Taiwan independence’ separatists,” the statement said.

Eswatini, a small enclave kingdom formerly known as Swaziland, is one of 12 countries that still recognise Taiwan. China has persuaded other nations to break diplomatic ties with the self-ruled island, which it claims as part of its territory.

Lai was due in Eswatini in April for the 40th anniversary of King Mswati III’s accession to the throne, but cancelled the visit after the Seychelles, Mauritius and Madagascar revoked overflight permissions, “unexpectedly and without notice”, according to his office.