NSW SES volunteers were called to the property on Cassey Crescent around midnight after the tree fell, taking out power lines on its way.

While no one was injured, the incident was just one of 10 storm-related incidents which kept crews busy throughout Sunday night and Monday morning.

A number of residents will be facing a major clean up this week, with several homes across Orange flooded following the heavy downpour.

Unit Commander, Inspector Rob Stevens said the majority of calls outs, which kept three trucks and the rescue officer's personnel vehicle out from 8.30pm-4.30am, involved flooding.

He said in 7/10 cases the flooding was from a build up of debris in gutters and down-pipes.

Mr Stevens said once the water builds up in blocked pipes it will go back through the awnings and into the house.

"Once it's in the roof cavity it can go anywhere in the house, people end up with water gushing down their walls and out of light fittings and fixtures," he said.

More than 18 millimetres fell between 8.30pm and 1.10am, according to recordings taken at the Orange airport, with the forecast for more on the way.

A severe thunderstorm has been predicted for Monday afternoon and evening, with the chance of short bursts of heavy rain.

Inspector Stevens said while the sun is out it was a good opportunity to clear gutters to prevent further damage.

"And if you come across flooded roads or property, don't drive or walk into it, because I guarantee the next person you'll see is the SES reaching down to get you out," he said.