In which city did an explosion occur that left one dead and dozens injured?

The confirmed incident involving an explosion that resulted in one death and numerous injuries took place in Pittsburgh, Pennsylvania. An explosion in urban areas can often relate to various factors such as industrial accidents, gas leaks, or construction-related issues. This particular case attracted significant media attention due to the severity of the impact and the number of individuals affected.

While other cities mentioned in the choices may have experienced incidents, none were reported to have a recent explosion meeting the criteria of resulting in fatalities and injuries like the one in Pittsburgh. The context and available news reports indicate that this tragic event is linked specifically to Pittsburgh, underscoring the city's recent challenges with safety regarding industrial or construction-related activities.