Life on the streets of Portland can be nasty and short.

That's the bleak conclusion of a Multnomah County report examining fatalities among local homeless people. Widely reported: 80 people died on county streets in 2016.

The average age of a homeless person who died last year was just 49. A third of homeless people who died were in an outdoor public space. And more than half the deaths had alcohol or drugs as a cause or contributing factor.

Here are the primary causes of death.