Temperatures will soar well past the 90s for the next few days in Southwest Pennsylvania.
Why it matters: Allegheny County issued a Code Red heat advisory on Monday, meaning people without air conditioning, health systems, industries and infrastructure will be endangered by high heat, according to the National Weather Service.
The big picture: A “heat dome” is hovering over much of the eastern half of the U.S., trapping warm air over the area for an extended period…