Philippines steps up search efforts for flood survivors

Typhoon Wasi triggered flash floods, landslides that swept houses into rivers and the sea
1 of 9
Two women hold their children killed during the passage of tropical storm Wasi at a village (AFP/Getty Images)
2 of 9
Rescuers searched for more than 800 people missing in the southern Philippines on Sunday after flash floods and landslides swept houses into rivers and out to sea (AFP/Getty Images)
3 of 9
More than 650 people in areas ill-prepared to cope with storms (AFP/Getty Images)
4 of 9
Cagayan de Oro and nearby Iligan cities on Mindanao island were worst hit when Typhoon Washi slammed ashore while people slept late on Friday and early Saturday (AFP/Getty Images)
5 of 9
The typhoon sent torrents of water and mud through villages and stripping mountainsides bare (AFP/Getty Images)
6 of 9
The Philippine National Red Cross (PNRC) said 652 people were killed in eight provinces in the southern Mindanao region, with more than 800 missing said. (AFP/Getty Images)
7 of 9
Floods washed away entire houses with families inside in dozens of coastal villages in Cagayan de Oro and Iligan (AFP/Getty Images)
8 of 9
The state disaster agency said adequate warnings had been given to officials and residents three days before the typhoon made landfall on Friday (AFP/Getty Images)
9 of 9
Disaster and health officials were struggling to deal with the scores of bodies that have been recovered (AFP/Getty Images)