Data: U.S. Census; Map: Erin Davis/Axios Visuals Clatsop County — home to coastal towns like Astoria, Cannon Beach and Seaside — has the highest share of households without air conditioning in Oregon, according to recent census data. Why it matters: As heat waves get more common and more intense due to climate change, more Oregonians may install A/C to stay cool and healthy — especially in places that aren't as used to extreme heat.