The Multnomah County Medical Examiner is investigating four deaths that could be heat-related.
One man died in Northeast Portland and two men died in Southeast Portland. They were 64, 75 a,d 84 years old. The ME didn't release any information about how they were found, or where they were living.
A fourth man who died was transported to a Portland hospital from outside of Multnomah County. He was 33-years-old.
Investigations into heat-related deaths can take several months to confirm the causes.