National Weather ServiceTennesseeExtreme Heat WarningArchive to October 1, 2026
Extreme Heat Warnings in Tennessee
The National Weather Service issued 11 extreme heat warnings for Tennessee in 2025 and 4 a year on average in 2008-2025; in 2021-2025 it had the 16th most of any state. 2026 through September: 10, 147% above the average of 4 for those months in 2008-2025. Shelby was covered most often (59 times since 2008).
How many extreme heat warnings does Tennessee get?
Every extreme heat warning that covered part of Tennessee. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 10 |
| 2025 | 11 |
| 2024 | 9 |
| 2023 | 10 |
| 2022 | 7 |
| 2021 | 1 |
| 2020 | 0 |
| 2019 | 4 |
| 2018 | 2 |
| 2017 | 3 |
| 2016 | 3 |
| 2015 | 3 |
| 2014 | 0 |
| 2013 | 0 |
| 2012 | 4 |
| 2011 | 7 |
| 2010 | 5 |
| 2009 | 2 |
| 2008 | 2 |
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 Tennessee 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 Tennessee?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Shelby | 59 | 28 | August 19, 2026 |
| Tipton | 52 | 25 | August 19, 2026 |
| Lauderdale | 51 | 26 | August 17, 2026 |
| Dyer | 46 | 24 | August 14, 2026 |
| Lake | 44 | 24 | August 14, 2026 |
| Obion | 43 | 23 | August 14, 2026 |
| Fayette | 36 | 21 | August 17, 2026 |
| Haywood | 35 | 20 | August 14, 2026 |
| Crockett | 35 | 20 | August 14, 2026 |
| Gibson | 34 | 20 | August 14, 2026 |
| Madison | 33 | 18 | August 14, 2026 |
| Weakley | 31 | 19 | August 14, 2026 |
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 Tennessee in AreaZine's record
NWS MemphisWarningAugust 18, 2026
Extreme Heat Warning: Craighead, Poinsett, Mississippi and 8 more, AR and MS
Expired 8:00 p.m. CDT, August 19, 2026
NWS MemphisWarningAugust 16, 2026
Extreme Heat Warning: Craighead, Poinsett, Mississippi and 26 more, AR and MS
Expired 8:00 p.m. CDT, August 17, 2026
NWS NashvilleWarningAugust 16, 2026
Extreme Heat Warning: Stewart, Montgomery, Robertson and 22 more, TN
Expired 7:00 p.m. CDT, August 16, 2026
NWS MemphisWarningAugust 14, 2026
Extreme Heat Warning: DeSoto, Marshall, Benton and 36 more, MS and TN
Expired 8:00 p.m. CDT, August 16, 2026
NWS MemphisWarningJuly 26, 2026
Extreme Heat Warning: Marshall, Benton, Tippah and 19 more, MS and TN
Expired 8:00 p.m. CDT, July 28, 2026
NWS NashvilleWarningJuly 26, 2026
Extreme Heat Warning: Stewart, Montgomery, Houston and 7 more, TN
Expired 8:00 p.m. CDT, July 28, 2026
NWS MemphisWarningJuly 20, 2026
Extreme Heat Warning: DeSoto, Marshall, Benton and 17 more, MS and TN
Expired 9:00 p.m. CDT, July 21, 2026
NWS MemphisWarningJuly 1, 2026
Extreme Heat Warning: Clay, Greene, Craighead and 34 more, AR and MO
Expired 8:00 p.m. CDT, July 2, 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 Tennessee.