National Weather ServiceOregonExtreme Heat WarningArchive to October 1, 2026
Extreme Heat Warnings in Oregon
The National Weather Service issued 8 extreme heat warnings for Oregon in 2025 and 4 a year on average in 2008-2025; in 2021-2025 it had the 13th most of any state. 2026 through September: 1, 75% below the average of 4 for those months in 2008-2025. Upper Hood River Valley was covered most often (19 times since 2008).
How many extreme heat warnings does Oregon get?
Every extreme heat warning that covered part of Oregon. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 1 |
| 2025 | 8 |
| 2024 | 10 |
| 2023 | 3 |
| 2022 | 7 |
| 2021 | 14 |
| 2020 | 7 |
| 2019 | 2 |
| 2018 | 6 |
| 2017 | 5 |
| 2016 | 3 |
| 2015 | 3 |
| 2014 | 0 |
| 2013 | 0 |
| 2012 | 1 |
| 2011 | 0 |
| 2010 | 0 |
| 2009 | 2 |
| 2008 | 1 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Oregon get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Oregon?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Upper Hood River Valley | 19 | 5 | August 22, 2025 |
| Jackson County | 18 | 5 | August 22, 2025 |
| Eastern Curry County and Josephine County | 18 | 5 | August 22, 2025 |
| Western Columbia River Gorge | 17 | 1 | August 13, 2023 |
| Greater Portland Metro Area | 17 | 1 | August 13, 2023 |
| Central Willamette Valley | 16 | 1 | August 13, 2023 |
| Oregon Lower Treasure Valley | 15 | 3 | August 2, 2024 |
| South Willamette Valley | 14 | 1 | August 13, 2023 |
| Lower Columbia Basin of Oregon | 14 | 7 | September 2, 2025 |
| Foothills of the Southern Blue Mountains of Oregon | 14 | 7 | September 2, 2025 |
| Foothills of the Northern Blue Mountains of Oregon | 14 | 7 | September 2, 2025 |
| Lower Columbia | 13 | 2 | August 13, 2023 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
The latest extreme heat warnings for Oregon in AreaZine's record
NWS PortlandWarningJune 11, 2026
Extreme Heat Warning: Tualatin Valley, West Hills and Chehalem Mountains, Inner Portland Metro and 5 more, OR and WA
Expired 11:00 p.m. PDT, June 16, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is an extreme heat warning?
An extreme heat warning means dangerous heat is expected, measured by heat index or temperature thresholds each office sets. It replaced the excessive heat warning in 2025. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. AreaZine's counts include the excessive heat warnings issued before the change. The national record · Every warning type in Oregon.