The heavy rainfall that battered Chile's usually arid north this week happened because of climate change, a senior meteorologist said, as the region gradually returns to normal after rivers broke banks and villages were cut off.

"For Chile, this particular system can only be possible in an environment of a changed climate," Deputy Secretary-General of the World Meteorological Organization Jeremiah Lengoasa told Reuters on a visit to Santiago on Friday.

Floods in Chile may have a contribution from climate change. Credit:AFP

The intense rainfall that began Tuesday in an area that is home to the Atacama, the world's driest desert, had resulted in nine deaths by Friday, with 19 people still missing, nearly 6,000 people in temporary housing and some roads cut off, the government's emergency office Onemi said.

Under a more familiar beating sun, people began to trickle back to debris-strewn villages and smashed houses. A curfew is in place in the Atacama region tonight, Onemi said, while operations at some mines in the top copper producer are still on hold.