Torrential rain set off by an approaching storm has swamped eastern Philippine cities and towns in widespread floods that have killed at least nine people, trapped others on their roofs and sparked frantic appeals for help.

Thousands of people were evacuated from their homes as parts of the country experienced unprecedented flooding, the authorities said.

Manila, Philippines—Philippine rescuers waded through chest-deep floodwaters Wednesday to reach residents trapped by Tropical Storm Trami, which has