Watch the water
https://www.wtae.com/article/hundreds-in-mckeesport-warned-to-not-drink-water-could-contain-harmful-chemicals/37054356
Found another article dated Friday 7pm but content says people were notified of issue Saturday.
https://triblive.com/local/allegheny-officials-downed-power-line-sparks-commercial-building-fire-in-mckeesport/