OAKLAND (CBS SF/BCN) –  California Highway Patrol said officers found a dead homeless woman in a tent Monday morning along Interstate Highway 580 in Oakland after a cold night. 

Someone called the CHP at 6:38 a.m. about a person in a blue tent along the Harrison Street off-ramp from westbound Highway 580.

Officers responded and when they arrived, they saw the woman was dead. A preliminary investigation indicates no foul play was involved in the death. 

A CHP spokesperson did not say how she may have died and it is not known if the death was weather-related. 

Last night in downtown Oakland, temperatures dropped to a low of 40 degrees, according to the National Weather Service.

According to the Centers for Disease Control and Prevention, hypothermia can even occur at temperatures above 40 degrees if a person becomes chilled by rain, sweat or from submersion in cold water.