Flint's Deadly Water

A two-year FRONTLINE investigation uncovers the roots and extent of a deadly Legionnaires’ disease outbreak during the Flint water crisis — and how officials failed to stop it.

Before Michigan switched Flint’s water supply in April 2014, a man who worked at the water treatment plant tried to sound the alarm. His sister reveals he said, “It’s not safe. We’re not ready... People are gonna die.”

Following a deadly Legionnaires’ disease outbreak that coincided with the Flint water crisis, a team of scientists urged the state's top health official, Nick Lyon, to step up surveillance for the disease or else more people could die. In FRONTLINE’s documentary “Flint’s Deadly Water,” they say his response was, “They’ll have to die of something.”