Boston firefighters are battling a heavy blaze in Dorchester Tuesday afternoon, as the raging fire “burned through the roof” of the large residence.

A fourth alarm was struck at around 2 p.m. for the fire on Cushing Avenue in Dorchester.

“All companies are working to contain the fire,” the Boston Fire Department tweeted after 1 p.m, noting the heavy fire in the basement and heavy smoke throughout the building.

“The fire continues to travel up throughout the building,” the fire department added about 30 minutes later.

“The fire continues to travel through the building and has now burned through the roof,” BFD wrote in another update as the fire kept growing.

Developing…