Helsinki authorities investigate rapid spread of high-rise fire in Kalasatama

Authorities in Helsinki are examining why a balcony fire in a Kalasatama apartment building spread violently to the roof, forcing the evacuation of over 60 units, Yle reports.

The Helsinki Rescue Department described the blaze as highly unusual, noting that initial reports suggested a contained fire on a balcony. Instead, flames rapidly climbed multiple floors, reaching the roof structure. “From our perspective, this was a routine call for a balcony fire—something that should have been confined to a small area,” said Deputy Fire Chief Pasi Korhonen. “The situation escalated unexpectedly.”

Investigators spent Monday inspecting the building’s structural integrity, searching for gaps or design flaws that may have allowed the fire to spread. Korhonen speculated that missing firebreaks or a structural error could be to blame but stressed that the exact cause remains under review. “We’re compiling all available data—construction plans, witness interviews, and physical evidence—to understand what happened and prevent future incidents,” he said.

Residents were initially advised to stay in their units, with evacuation ordered only after flames reached the roof. Police secured the area to ensure firefighters could work without interruption.

One displaced resident, Maarit Savolainen, told Yle she spent Saturday night at a friend’s home after a crisis support bus arrived hours into the incident. She had placed her two dogs in a boarding facility in Lohja. Savolainen said she was initially told her unit, which suffered smoke damage, might be accessible—only to learn later that the entire building was deemed unsafe due to destroyed technical systems.

Attempts to contact her landlord, Lumo, and her insurance provider have yielded little progress. “I was promised a call about alternative housing, but no one has reached out,” she said. “My whole life has been upended. I don’t even have a home to return to.” Savolainen criticized the slow response from both Lumo and emergency services, questioning how a small balcony fire escalated into a full-blown crisis. She is now awaiting an insurance report—required before any compensation can be processed—but has struggled to get updates from the fire department.

Lumo, the rental housing company managing the building, will hold an information session for residents on Wednesday, attended by city crisis support teams and fire officials. “Our immediate priority was ensuring no one was injured, and thankfully, that was the case,” said Janne Ojalehto, Lumo’s director of operations. He confirmed that nine residents remain uncontacted as the company works to secure temporary housing.

The building remains uninhabitable due to extensive damage to its technical infrastructure.