Taiwan's weather bureau issued sea and land warnings Sunday, as slow-moving Typhoon Nanmadol moved away from the Philippines, leaving death and destruction in its wake.

Taiwan weather officials say Nanmadol may not make landfall, but warn that the powerful storm is expected to move north along Taiwan's eastern coast Monday and Tuesday on its way to Japan's southern Okinawa island.

Officials in the Philippines said Sunday that at least seven people were killed by drowning or landslides and six are missing after the storm drenched northern provinces for days before pounding them with wind gusts of up to 230 kilometers per hour.

Authorities say the casualties count could rise as officials assess the full impact of the storm.

The storm is moving at about eight kilometers an hour, with decreased winds still reaching 155 kilometers per hour.