This has been caused by cold La Nina temperatures in the Eastern Tropical Pacific that pushed the jet stream northward, shifting moisture and rainfall eastward.
The warm, moisture-laden air brings heavy rainfall and flash flooding to Peru's northern coast, killing villagers and causing havoc to the fragile soils of the desert and of the arid Andean foothills.
Cloud seeding is a technology that facilitates rainfall by extracting the maximum amount of moisture from the atmosphere, condensing it around chemical pellets.