Weather conditions triggered red flag warnings Tueaday 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.

Unusually dry weather, an abundance of ‘dry fuels’, low relative humidity and strong winds combine to create high risk of fire spread.

Massachusetts is under a red flag warning again on Tuesday as dozens of brush fires continue burning across the state.What is a red flag warning?The National Weather Service issued the red flag warning through 6 p.

A Red Flag Warning has been extended into Wednesday as firefighters across the Commonwealth continue to battle brush fires.

New Jersey has been experiencing a combination of dry forest grounds, dry air with relative humidity values and windy conditions. A Red Flag Warning meanswhen there are warm temperatures, very low humidity, and stronger winds in the forecast that combination can produce an increased risk of fire danger.

A Red Flag Warning​ is back in effect for much of New York, New Jersey and Connecticut, as the fire threat remains high.

A new Red Flag Warning has been issued for Tuesday as firefighters across the Commonwealth continue to battle brush fires.