Officials in Brazil say more than 800 people are now known to have died in floods and landslides in the south-east of the country this month.
More than 400 people are still missing after torrential rain caused whole hillsides to collapse.
The Brazilian government has said it will set up an early warning system to alert communities of impending danger.
The flooding is considered the worst natural disaster Brazil has ever experienced.
The government has allocated $240m (£150m) in emergency reconstruction money for the area.