Alerts have been issued in areas already ravaged by floodwaters as more devastation looms.

River levels are on the rise again in the flood-stricken Brazilian state of Rio Grande do Sul after more heavy rains on the weekend.

The Taquari and Caí rivers have burst their banks and are causing fresh flooding in the interior of the state.

More than half a million people have been displaced from their homes and 147 are confirmed to have died in the floods.

Rescue workers continue to search for people who are missing.