Source: Bureau of Meteorology

For people in parts of Blue Mountains/Hawkesbury, Maitland/Cessnock, Gosford/Wyong and Sydney areas.

Issued at 11:17 am Tuesday, 22 February 2022.

Heavy rainfall continuing with the redevelopment of intense rainfall possible.

The Bureau of Meteorology warns that, at 11:05 am, severe thunderstorms were detected on the weather radar near Parramatta, Bankstown, Fairfield, Horsley Park, Maroota, Wisemans Ferry and Paxton. They are forecast to affect Blacktown, Erskine Park, Glenorie, Riverstone, Strathfield and Wollombi by 11:35 am and Sydney Olympic Park, Richmond, Windsor, the Yengo National Park northwest of St Albans, Cranebrook and Penrith by 12:05 pm.

Heavy rainfall that may lead to flash flooding is likely.

Wyong (Olney Forest) has recorded 80mm of rainfall in the 45 minutes to 10:30am.

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.