Thresholds for Extreme Heat
Below are preliminary Heat Index (HI) thresholds for extreme heat, organized by North Carolina Disease Event Tracking and Epidemiological Collection Tool (NCDETECT) region*.
These thresholds will be updated as more data become available.
| NC DETECT Region Name | NC DETECT Region Number | Additional Counties | Heat Index Threshold (°F) |
| Northeastern North Carolina (NENC) | 1 | 101 | |
| Southeastern North Carolina (SENC) | 2 | 103 | |
| Fayetteville Area (FAY) | 3 | Montgomery | 102 |
| Research Triangle Park Area (RTP) | 4 | Randolph, Guilford, Caswell | 100 |
| Triad Area (TRIAD) | 5 | 99 | |
| Western North Carolina (WNC) | 6 | 94 | |
| Charlotte Area (CLT) | 7 | Davidson, Davie | 101 |
*Unless otherwise noted in the “Additional Counties” column, appropriate NC DETECT groupings for each jurisdiction can be obtained from the map below. Counties listed in the “Additional Counties” column were assigned a different threshold from their original NC DETECT region.
