A major landslide in the city of Ketchikan, Alaska, killed one individual and harmed three on Sunday.

Three individuals were quickly transported to the Ketchikan Medical Centre after the landslide, which happened around 4 p.m. on Sunday and destroyed homes and infrastructure, the Ketchikan Gateway Borough and the City of Ketchikan said in a joint statement on Sunday. All other people have been accounted for, the articulation said.

“In my 65 years in Ketchikan, I have never seen a landslide of this size,” Ketchikan Mayor Dave Kiffer said in a statement. “With the slides we have seen over the area, there is clearly a region-wide issue that we need to understand with the help of our state geologist.”

He said the loss of life was “heartbreaking, and my heart goes out to those who lost their homes.”

An unusual weekend bout of rain followed after the landslide in the midst of an unusually dry August, said Andrew Park, a meteorologist in Juneau with the National Weather Service. The rain service said Ketchikan had gotten almost 2.6 inches (66 millimeters) of rain in approximately 36 hours.

Landslides can be unusual, but this one happened without certain other risk factors, such as high winds, Park said. “There weren’t any of the big red flags we would ordinarily see,” he said.

Power was restored to some landslide-influenced regions by 8:15 p.m. Other regions will stay without power till the landslide is cleared and broken power poles are supplanted, the borough and city said.

Heavy downpours on Nov. 20 in Wrangle, almost 100 miles from Ketchikan, killed six individuals, counting a family of five, and crushed two homes while burying a section of the highway.