RESIDENTS in flood-prone areas will be alerted to prepare for the North East monsoon, due to arrive in November.

Over the next few weeks, national water agency PUB will hand out 200 flood advisory notices to residents living in flood-prone areas, such at Fort Road and Mountbatten Road in Katong.

The advisory, like those handed out in previous years, will detail high-tide times which, when coincide with heavy rain, can lead to flash floods in low-lying areas.

This year, more residents will receive the advisory as the list of flood-prone areas has grown to 71 in August from 52 in July. New areas identified include Arab Street and Jalan Boon Lay.

The PUB has also added to its website a new 'managing flash floods' microsite which includes an interactive map showing the water levels in canals across Singapore at 10-minute intervals. The site went up at the end of August following flooding in June and July.

When a drain hits 75 per cent full, there is a high risk of flooding.

Monsoon alert