Weather conditions triggered red flag warnings in the northeast part of the United States as firefighters in California continued to battle a large wildfire that has burned over 20,000 acres.

Firefighters in California gained a foothold in the battle against a wildfire north of Los Angeles while weather officials on Tuesday issued red flag warnings across the Northeast, where blazes turned deadly over the weekend.

More small wildfires have broken out across the northeastern U.S. in a series of blazes officials are blaming on very dry conditions throughout the region.

A number of cities will be under red flag warnings Sunday, indicating an increased risk of fire danger, the National Weather Service said.