The lives of two more children have been claimed in a blaze at a Chicago firefighter’s Northwest Side home that also took the lives of his wife and eldest son.

Firefighter Walter Stewart’s 2-year-old son, Emory Day-Stewart, and daughter, Autumn Day-Stewart, 9, both died Friday, according to the Cook County medical examiner’s office.

The firefighter’s wife, Summer Day-Stewart, 36, was pronounced dead Thursday night, and his 7-year-old son Ezra Stewart died Wednesday, officials said.

A fire department source said Stewart had agreed to donate organs from all four family members so that others who need transplants could live.

The fire department first notified fellow members to see if anyone was in need of a donation, the source said.

Stewart, a firefighter-EMT with the department for nearly three years, was working about 9 p.m. Tuesday on Truck 55 in Old Norwood Park when he learned a fire had broken out at his Montclare home in the 2500 block of North Rutherford Avenue, according to fire officials and a spokesman for Chicago Fire Fighters Union Local 2.

Stewart was rushed home by a battalion chief and attempted to resuscitate his wife using CPR.

Fire officials said the blaze started in the kitchen of the family’s home.

Emory and Autumn were initially listed in critical condition, but succumbed to injuries related to smoke inhalation, the medical examiner’s office said.

The firefighters union is collecting donations for Stewart’s family at: classy.org/give/473700.