Capt. Matt Burton and Scott Desmond, a fire engineer, died July 21, 2007, battling a house fire that also killed two residents.
The U.S. Capitol, the White House and other governmental buildings will also lower their flags to half-staff, according to Contra Costa County Fire Protection District spokeswoman Emily Hopkins.
On Oct. 16, 2001, President Bush approved legislation requiring the U.S. flag to be lowered to half-staff on all federal buildings to memorialize fallen firefighters.
