The mayor of Flint, Michigan on Monday night declared a State of Emergency over lead poisoning from the drinking water—after more than a year of public outcry that residents, particularly children, are being irreparably harmed by the dangerous toxin.

The newly-minted Mayor Karen Weaver issued the declaration in response to a “man-made disaster” sparked when the city, in April 2014, moved from the Detroit system to the Flint River “as a water source,” according to a statement from her office. That decision last year was enforced by Flint emergency manager Darnell Earley, who was appointed by the Republican Governor Rick Snyder.

“This switch has resulted in elevated lead levels in drinking water which prompted both the City and the County Health department to issue a health advisory earlier this year,” said Weaver’s office. While Flint returned to the Detroit water system in October following public concern—and years of official inaction—Weaver warned that “lead levels remain well above the federal action level of 15 parts per billion in many homes.”

Weaver is seeking federal help in dealing with the crisis after scientists, city and county officials, and residents sounded the alarm.

A study released in September by researchers at the nearby Hurley Children’s Hospital identified a “rise in blood lead levels of children less than 5 years old” living within two Flint Zip codes since the city began sourcing drinking water from the Flint River. Also in September, the city and county released health warnings after “hearing concerns from the medical community.”

But many credit protests and organizing led by community groups such as “Water You Fighting For” for raising the profile of the emergency. In July, the People’s Water Board Coalition staged a march from Detroit—itself the site of a water-related human rights crisis—to Flint demanding “clean and affordable water in Michigan.”

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