Warm, dry, breezy weather to challenge fire crews in Arizona
Both blazes were moving through grass, brush and pine trees on the northern outskirts of Flagstaff.
The larger fire has burned more than 38 square miles and was 27% contained Thursday. A smaller fire is burning in the same region.
The forecast calls for chances of showers and thunderstorms starting Friday and through the weekend, which could help suppress the wildfires.
Flooding and dry lightning are also concerns.
The largest wildfire in the U.S. is burning in northern New Mexico.