The government has declared a state of emergency as it seeks to bring relief to regions of Peru hard hit by Cyclone Yaku. They include Lambayeque, Piura and Tumbes.
Early on Friday, the National Institute of Civil Defense (Indeci) said flooding caused by the cyclone had claimed six lives, Reuters reported.
Later, Indeci said 58 people had been killed since the start of the rainy season, which began some months ago. It did not provide a specific timeframe for the casualties.
Peru has been riven by instability and anti-government protests over the past few months, since Congress removed former president Pedro Castillo from power last December.
Current President Dina Boluarte visited parts of northern Peru on Saturday as the government delivered humanitarian aid to areas badly hit by the cyclone.