Maintenance began 4/24/2026. Grinding on 4/30/2026, with fire watch in place, caused smoldering in combustible material near the work area, which was extinguished. Additional grinding occurred 5/1/2026. On 5/2/2026, a fire was reported on the plant roof at 6:05 AM and extinguished within one hour. Sections of the metal roof were cut to access hot spots, requiring replacement.