The fire near the park's headquarters was initially holding steady and not actively spreading Tuesday morning — but that changed by the afternoon as winds started kicking up across the Big Bend region and the fire started spreading to the southeast.
Heavy winds likely had a factor in the fire breaking out on Monday — it was sparked by a downed power line.
The park is still open — save for a couple backcountry campsites near the fire — and the park says the fire's still not a threat to people or structures.
But additional firefighting resources were called in on Tuesday evening as the fire moved into more rugged, inaccessible terrain.
Fire crews could be helped some today by a forecast for much calmer winds across the region.
More updates can be found at Marfa Public Radio.