The Bureau of Meteorology has issued a severe thunderstorm warning for Maitland and the wider Hunter region.
The warning is for damaging winds, large hailstones and heavy rain.
The bureau advises residents to:
The State Emergency Service advises that people should:
* Move your car under cover or away from trees.
* Secure or put away loose items around your house, yard and balcony.
* Keep at least 8 metres away from fallen power lines or objects that may be energised, such as fences.
* Don't walk, ride your bike or drive through flood water.
* Unplug computers and appliances.
* Avoid using the phone during the storm.
* Stay indoors away from windows, and keep children and pets indoors as well.