A woman who likely froze to death at a Tigard retirement community was found alone in her room with the window open and the thermostat turned down, police said Tuesday.

Staff at the Summerfield Estates called officers to the scene about 11 a.m. Monday after finding the 63-year-old woman dead earlier that morning, said Tigard Police spokesperson Kelsey Anderson.

The woman, who was not immediately identified, resided in the community’s independent living facility, she said.

Tracey Johns, Summerfield Estates’ executive director, said residents have control over the temperatures in their separate apartments.

“It’s very sad,” she said.

Officials with the Washington County Health and Human Services Department announced the death investigation Tuesday morning, saying a county medical examiner had classified the death as “hypothermia related.”

The retirement community didn’t lose power during the incident, a spokesperson for the department said.

The official cause of death will require further testing and won’t be known for weeks or months, according to the health department.

If confirmed, it would be at least the fifth winter weather casualty since freezing temperatures arrived.

Multnomah County officials reported that two men had died of suspected hypothermia in separate incidents over the weekend, while two other fatalities were reported from ice-laden trees. A tree toppled onto one person inside their Lake Oswego home and another tree fell on an RV in Southeast Portland.

Two women in their 70s died in a fire at a northeast Portland church as well, though firefighters said it wasn’t immediately clear if they had started the fire to keep warm.