Welcome to DU! The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards. Join the community: Create a free account Support DU (and get rid of ads!): Become a Star Member Latest Breaking News Editorials & Other Articles General Discussion The DU Lounge All Forums Issue Forums Culture Forums Alliance Forums Region Forums Support Forums Help & Search

marble falls

(71,932 posts)
Tue Dec 2, 2025, 11:18 AM Dec 2025

Thousands Urged To Stay Inside In Oregon

Thousands Urged To Stay Inside In Oregon

By Amanda Greenwood

https://www.newsweek.com/thousands-urged-stay-inside-oregon-air-pollution-epa-ozone-11139198

-snip-

The map showed an area of fine particle (PM2.5) pollution in the "unhealthy" Air Quality Index (AQI) category around La Pine in Deschutes County, and John Day in Grant County as of 2.45 a.m. ET.

PM2.5 are tiny particles of pollution that are usually 2.5 micrometers or less in size—roughly 30 times smaller than a strand of hair—that enter the atmosphere and are often unknowingly inhaled. They can come from various sources, ranging from construction sites and wildfires, to power plants and car emissions.


?w=1600&quality=80&webp=1

A man crosses a street in Portland, Oregon, amid hazy weather conditions in 2020. (ROBYN BECK/AFP/Getty Images) | Photo by ROBYN BECK/AFP via Getty Images

12 replies = new reply since forum marked as read
Highlight: NoneDon't highlight anything 5 newestHighlight 5 most recent replies
Thousands Urged To Stay Inside In Oregon (Original Post) marble falls Dec 2025 OP
Yikes! Cause? surfered Dec 2025 #1
Maybe a confluence of temp, an inversion, holiday traffic and powerplants producing for the cold season ... marble falls Dec 2025 #2
Is this near Bend, OR? surfered Dec 2025 #3
Yup, 2naSalit Dec 2025 #6
There's a wildfire in that area. tinrobot Dec 2025 #5
Inversions trap air in valleys; the smoke builds up. maxsolomon Dec 2025 #11
They used a 5 yr old photo? leftstreet Dec 2025 #4
No one has time to drive to John Day to take a picture of bad air. maxsolomon Dec 2025 #8
The people living there might have cameras leftstreet Dec 2025 #9
Definitely possible. maxsolomon Dec 2025 #10
Plus the prevailing northwesterly winds would indicate Portland would not be impacted by an event near Bend Oregon Brother Buzz Dec 2025 #12
Bend is a beautiful area surfered Dec 2025 #7

marble falls

(71,932 posts)
2. Maybe a confluence of temp, an inversion, holiday traffic and powerplants producing for the cold season ...
Tue Dec 2, 2025, 12:00 PM
Dec 2025

... and AI.

maxsolomon

(38,729 posts)
11. Inversions trap air in valleys; the smoke builds up.
Tue Dec 2, 2025, 03:21 PM
Dec 2025

Wood burning stoves, vehicle exhaust can do it. Places like Missoula are notorious for crap air from them.

maxsolomon

(38,729 posts)
8. No one has time to drive to John Day to take a picture of bad air.
Tue Dec 2, 2025, 02:54 PM
Dec 2025

It's in the middle of nowhere.

maxsolomon

(38,729 posts)
10. Definitely possible.
Tue Dec 2, 2025, 03:19 PM
Dec 2025

Newsweek is also understaffed and lazy, so they just pulled a stock picture of "Bad Air - Oregon".

Brother Buzz

(39,900 posts)
12. Plus the prevailing northwesterly winds would indicate Portland would not be impacted by an event near Bend Oregon
Tue Dec 2, 2025, 03:25 PM
Dec 2025
Latest Discussions»General Discussion»Thousands Urged To Stay I...