Two people are unaccounted for after a landslide smashed into a house in the town of Brazzano di Cormons, near Gorizia, amid torrential rain overnight.
Firefighters managed to pull one person out of the rubble alive.
That person suffered a broken leg and was taken to hospital in Udine.
The extreme weather has also caused flooding, damage and major disruption to other parts of Friuli Venezia Giulia.
The region is among six that have been put on alert because of the storms, along with Emilia Romagna, Liguria, Lombardy, Tuscany and Umbria.
