The National Weather Service issued a “red flag” warning this morning for all leeward sections of the Hawaiian islands because of strong trade winds and low humidity, indicating the potential for widespread brush fires.

The warning is in effect until 4 this afternoon.

Honolulu Fire Department Capt. Terry Seelig, said a “red flag” warning means that “there is now a greater potential now” for a brush fires in Leeward Oahu because of the weather conditions.

He asked that the public be cautious and report fires and suspicious activities immediately.

The National Weather Service has said low rainfall, low humidity and sustained wind speeds of more than 20 mph, as measured at Honolulu Airport, are the criteria for a red-flag warning. Low humidity means fires will burn hotter and faster.