Pittsburgh, Pa. – Sweltering heat and powerful storms are set to converge on western Pennsylvania by Wednesday afternoon, prompting urgent public safety warnings.
According to the National Weather Service in Pittsburgh, an Extreme Heat Warning remains in effect through 8 p.m. Wednesday, with heat index values climbing as high as 105°F across Allegheny, Westmoreland, Beaver, Butler, Washington, and Fayette counties. Thunderstorms will likely follow by late afternoon, with strong winds and locally heavy rain expected to complicate commutes and outdoor work.
Heat-related illness risk will be significantly higher, especially for those without access to air conditioning. PennDOT urges travelers to avoid non-essential trips during peak heat hours, especially along I-376 and I-79, where pavement temperatures could surge above 130°F. The Occupational Safety and Health Administration advises frequent breaks in shaded areas and drinking plenty of fluids.
By Wednesday evening, the heat will give way to multiple rounds of thunderstorms—some possibly severe—with a Level 1 Marginal Risk for wind damage and flash flooding. Rainfall may continue into Thursday and Friday, especially during afternoon hours, creating an ongoing risk for urban and stream flooding.
What’s Ahead:
Heat returns later this week with highs again in the 90s through Friday. Rain chances stay elevated into the weekend.
📆 Five-Day Forecast: Pittsburgh, PA
- Tuesday (June 24): High 97°F, heat index up to 105°F. Sunny and hot.
- Wednesday (June 25): High 93°F. T-storms likely by afternoon. Heat Index 101–105°F.
- Thursday (June 26): High 90°F. Showers and storms possible by late morning.
- Friday (June 27): High 91°F. More storms possible, especially after 2 p.m.
- Saturday (June 28): High 87°F. Showers and storms likely.
