As climate change increases the frequency and severity of extreme weather events, planning and preparedness are especially important. EPA has finalized new requirements for certain facilities to develop response plans for worst-case discharges of hazardous substances, or threat of such discharges, into or on navigable waters or conveyances to navigable waters. These requirements help protect the environment by ensuring that facilities have planned for and can respond to discharges of hazardous substances, particularly in communities with environmental justice concerns, which are disproportionately located in proximity to industrial facilities.