The area consumed by the fires reached 1,373 hectares (3,393 ​acres) as of early Sunday morning, up 7% from ​a day earlier.

The fires threaten residential districts of Otsuchi ⁠on the Pacific Coast - a town that lost nearly a ​tenth of its population in one of Japan’s worst disasters, the ​March 2011 earthquake and tsunami.

Evacuation orders are in place for 1,541 households or 3,233 residents, roughly a third of Otsuchi’s population.

“Although the Self-Defence Forces are ​fighting the fires from the sky (with helicopters), the dry weather ​and winds are helping the fires expand,” Otsuchi Mayor Kozo Hirano told ‌a ⁠press conference.

One Otsuchi resident said he worried about the damage the wildfire could inflict.

“A fire burns everything down. With a tsunami, you might have something left after the destruction,” Yoshinori Komatsu, 74, said ​as he watched ​Self-Defence Force ⁠helicopters dump water over fires in the distance.

The only casualty to date has been one minor ​injury suffered when a person fell at an ​evacuation centre, ⁠Japan’s Fire and Disaster Management Agency said on its website.

No rain is expected in the region on Sunday or Monday, but a ⁠brief ​shower is forecast on Tuesday, according ​to the Japan Meteorological Agency.

The cause of the fires is unclear and under investigation.