Igor Arrieta secured victory during stage five of the Giro d'Italia in Potenza after battling through heavy rain and hail.Afonso Eulálio took the overall race lead by finishing second in the stage despite multiple crashes on the technical course.The peloton struggled significantly in the Lucanian mountains as former leader Giulio Ciccone fell over seven minutes behind the front runners.Riders described the 203-kilometer route as one of the most perilous days of their careers due to intense weather and frequent vehicle incidents.