Crews reported building line and mopping up in high daytime temperatures, followed by overnight patrols. An update credited night work with advancing containment; the figure reached 95% before the final announcement.
Incident record
| Reported start | 15 July 2026 |
|---|---|
| Location in the incident record | Buckthorn Trail and Clover Trail |
| County listing | San Diego |
| Reported footprint | 1,234 acres |
| Recorded containment | 100% |
Working through extreme heat on the Thorn Fire
Those assignments explain why reporting only the daily high temperature would give an incomplete operational history. The team continued to inspect for heat after dark. The account does not supply personal heat-exposure measurements or attribute a specific injury to the weather.