Public response After widespread high-level environmental contamination from a nuclear power plant accident or intentional release of radioactive material, exposure can be reduced either by Sheltering in place Evacuating the contaminated area The better approach depends on many event-specific variables, including The time elapsed since initial release Whether release has stopped or is ongoing Weather conditions Availability and type of shelter Evacuation conditions (eg, traffic, transportation availability) The public should follow the advice of local public health officials as given on emergency alert notification systems.