Source: Bureau of Meteorology

For people in parts of Greater Wollongong and Sydney areas.

Issued at 10:50 pm Saturday, 11 May 2024.

The Bureau of Meteorology warns that, at 10:45 pm, a severe thunderstorm likely to produce heavy rainfall that may lead to flash flooding was detected. The thunderstorm is moving towards the southwest. It is forecast to affect Helensburgh by 11:00 pm and waters off Stanwell Park and Stanwell Park by 11:15 pm.

The State Emergency Service advises that people should:
* Keep clear of creeks and storm drains.
* Don't walk, ride your bike or drive through flood water.
* If you are trapped by flash flooding, seek refuge in the highest available place and ring 000 if you need rescue.
* Unplug computers and appliances.
* Avoid using the phone during the storm.
* Stay indoors away from windows, and keep children and pets indoors as well.
* For emergency help in floods and storms, ring the SES (NSW and ACT) on 132 500.