Metrorail riders weathered serious delays with two smoking insulators, one switch malfunction, a sick customer and a scheduling mishap just during the morning commute on Wednesday. And that was before a storm was slated to blow across the region, bringing with it up to 10 inches of snow.

But Wednesday’s troubles on the Red, Orange, Blue and Green lines came on top of several days of terrible commutes — delays caused by three cracked rails, the evacuation of the Red Line’s Forest Glen station because of a train’s smoking brakes, more switch malfunctions, more smoke, a Metro worker’s injury, a derailment of track equipment, and evacuated trains.