Acre city faces relocation after historic 75% flood inundates Brasiléia

In late February, the Acre River rose to 15.58 meters in the city of Brasiléia, a border town of 26,000 people wedged between Brazil and Bolivia. The water covered three-quarters of the municipality—a threshold no one had seen in more than a century of recorded history. When the floodwaters finally receded in early March, the city's leadership faced a question that went beyond sandbags and cleanup: should Brasiléia simply be rebuilt where it stood, or should the entire town move to higher ground?

The numbers told a stark story. Of the municipality's 26,000 residents, 15,000 were directly affected. Nearly 1,300 people lost their homes entirely; another 2,220 were displaced to temporary shelter. The city set up 16 emergency shelters to house the displaced. Seventeen public buildings sat underwater. Twenty bridges were destroyed by the force of the current. The single road connecting Brasiléia to the rest of Brazil—the bridge to neighboring Epitaciolândia—was closed when water breached its limits. For weeks, the only way out of the city was eastward into Bolivia.

Mayor Fernanda Hansemm and Governor Gladson Camelli both began advocating for relocation almost immediately. Hansemm pointed to a troubling pattern: this was the fourth major flood in Brasiléia in twelve years. The intervals between catastrophic inundations had compressed. What used to be rare events separated by decades had become almost routine. "These climate changes are no longer long-term phenomena," Hansemm said. "Practically every year has become a reality. Each flood comes with proportions much greater than the one before." Camelli was blunt in his assessment: without moving the city to elevated terrain, officials would be back in the same crisis within eleven months. He called for the federal government to help fund and coordinate a three-tier relocation effort involving municipal, state, and national authorities.

The 2024 flood in Brasiléia was not an isolated event in Acre. Across the state's 22 municipalities, 19 had declared emergencies. More than 100,000 people statewide were affected by rising waters. In the state capital, Rio Branco, the Acre River reached 17.86 meters—the second-highest level ever recorded, surpassed only by the 2015 flood. The state government opened 97 emergency shelters that housed nearly 10,000 people, with another 17,480 staying in the homes of relatives and friends. The pattern was unmistakable: four of the six largest floods on record in Rio Branco since measurements began in 1971 had occurred in the last twelve years.

Environment Minister Marina Silva, herself from Acre, visited the region on March 4 alongside Regional Integration Minister Waldez Góes. Silva announced that the federal government was preparing to declare a permanent climate emergency across 1,038 municipalities identified as particularly vulnerable to climate-driven disasters. Brasiléia and other Acre communities would be among them. She framed the floods not as anomalies but as evidence of a new climate reality already unfolding. The government's response, she said, would operate on two tracks: reducing emissions to slow warming, and building structural interventions in vulnerable cities to help them endure the impacts that were already locked in.

What made Brasiléia's situation especially acute was its geography. The city sits in a floodplain with limited high ground nearby. Moving an entire municipality of 26,000 people—relocating homes, businesses, schools, hospitals, municipal offices—is not a matter of weeks or months. It requires land acquisition, infrastructure planning, financing, and the consent of residents who have lived there for generations. Yet the alternative, as Camelli framed it, was accepting a cycle of recurring disaster. The governor's appeal to President Lula was a signal that this decision would need to move beyond local and state authorities. The relocation of Brasiléia, if it happened, would be one of Brazil's largest climate-driven municipal relocations in recent memory, a physical acknowledgment that some places, in their current locations, may no longer be sustainable.