Emergency crews in the Alaska tourist hub of Ketchikan braced on Monday for more landslides after a large, rain-drenched slope gave way on Sunday, killing one person, injuring three others and leaving tens of homes damaged and without power.

Photos from the aftermath of the slide showed a wide tract of a steep, thickly wooded hillside stripped of vegetation, and a tangle of twisted, broken pine trees and other debris that lay heaped against several buildings at the bottom of the slope.

Four or five homes were heavily damaged or destroyed, and about four dozen dwellings were placed under mandatory evacuation and left without electricity, according to Cynna Gubatayao, an emergency operations center official.

"In my 65 years in Ketchikan, I have never seen a slide of this magnitude," Mayor Dave Kiffer said in a statement posted online.

One man was confirmed killed, and three other people were injured, two of whom were hospitalized, according to a joint statement from the Ketchikan Gateway Borough anOfficials later identified the man who died as Sean Griffin, a senior maintenance technician for the city public works department who was clearing stormwater drains with another crew member when they were caught in the landslide. Griffin's age was not given.

No one was reported missing from the disaster.

Authorities said the area around the slide remained unstable, with a potential secondary landslide zone identified south of the original site and emergency response teams standing by the city of Ketchikan.

Gubatayao told Reuters by phone that Sunday's slide, which occurred at about 4:00 pm, followed a day of heavy downpours. 

Forecasts called for showers to continue across the region through Monday.