Several Greater Danbury fire departments have been busy battling brush fire in the last few days.  On Sunday, five acres in Danbury burned.  The Bethel Fire Department says a small brush fire in that town was quickly extinguished.  The forest fire danger level today is HIGH and the National Weather Service has issued a Red Flag warning for all of Connecticut.  That means open burn permits are suspended.  With high wind gusts forecast throughout the day, officials say it will be difficult to control brush fires.  The lack of rain and the low humidity also make fires more likely.  State residents are also urged to be cautions with outdoor cooking fires.