Heroic firefighter Michael Davidson gave his life Thursday night while responding to a fire at the set of a movie in Harlem — yet another devastating reminder that first responders truly risk it all to protect this city.

Davidson, 37, was nozzleman for the crew that headed into the fiery building after actor/screenwriter Edward Norton alerted police to smoke coming from the basement.

Separated from the team as it retreated from the advancing fire, Davidson was later found unconscious on the floor and rushed to Harlem Hospital, where he was pronounced dead.

He leaves behind his wife, Eileen, and four children ages 1, 3, 6 and 7. Norton and the rest of the “Motherless Brooklyn” film crew offered condolences: “Our hearts ache in solidarity with his family. New York City firefighters truly are the bravest in the world.”

The FDNY notes that Davidson, cited for bravery four times during his 15 years with the department, is the 1,150th city firefighter to die in the line of duty. His father is an FDNY retiree who served 26 years in the same Engine Company 39; his brother is an 11-year FDNY vet assigned to Engine Company 88 in The Bronx.

Fire Commissioner Daniel Nigro has it right: “Our entire city mourns his loss.” Rest in peace.