Parts of the region are under flash flood warnings, with the latest set to expire at 3:15 a.m. Friday, as the National Weather Service warned of heavy rain. On Thursday evening, the weather service issued a flash flood emergency for southwest Allegheny County, including Oakdale and Coraopolis, and northern Washington
While many of Pittsburgh's underground waterways serve as stormwater and sewer networks, environmentalists and officials see potential in these covert culverts.
PWSA is asking the public for help in deciding what kind of a stormwater system to build for its residents. It released a draft of a strategic plan that will help prioritize stormwater projects based on public input.