Authorities said 1,640 square miles (4,248 square kilometers) of the fire were on the Texas side of the border. Previously, the largest fire in recorded state history was the 2006 East Amarillo Complex fire, which burned about 1,400 square miles (3,630 square kilometers) and resulted in 13 deaths.
Ah, I did mix them up. Largest in Texas indeed
https://apnews.com/article/texas-panhandle-fire-evacuations-cbbb6a279bef1bd020722ed48927114a