Strong winds have whipped Adelaide, leaving damage including a fallen tree which hit a house and exposed a hydroponic drug crop inside.

Police said the tree crashed onto the roof of a house in Sunnyside Road at Glen Osmond and the damage revealed the glow of lights being used for the drug operation.

Parks closures due to danger Visitors to parks in the greater Adelaide region are advised roads and trails may be closed as parks staff from Natural Resources Adelaide and Mt Lofty Ranges assess damage and clear fallen limbs.

It said temporary park closures were already in place at Belair National Park, Morialta Conservation Park and the Waterfall Gully to Mt Lofty walking trail.

In other parks, some roads and walking trails could be closed while an assessment is made or while work takes place to clear fallen limbs.

The parks affected by the storm stretch from northern Adelaide through the Mt Lofty Ranges to the southern Fleurieu and also include Para Wirra, Black Hill, Cleland, Onkaparinga and Deep Creek.

People can ring 08 8278 5477 for latest details.

At first, neighbours had been worried the glow was a fire in the roof and had called the fire service.

Police are now trying to trace the owner of the unoccupied property.

The State Emergency Service (SES) has been busy dealing with calls as people woke to find the damage from a wild night.

John Carr of the SES says wide parts of Adelaide have been affected by the severe wind gusts.

"Mostly they've been in the Adelaide metropolitan area, the southern suburbs in particular have been hard hit, but also the suburbs to the east and in the foothills as well," he said.

Burnside Council's Jenny Barrett says council workers are facing a big task to clear fallen trees and limbs.

"It's more than just sporadic. I spoke to our depot manager and their crews are going from street to street and almost every second or third street has got some form of storm or wind damage," she said.

Duty SES officer Graeme Wynwood says recent extreme heat weather most likely contributed to the high number of problems.

"It's certainly one of the worst events we've had for a number of years with trees falling down," he said.

"Normally this happens in the context of a more traditional storm that's got rain and things attached to it. This is purely a wind event that's followed on from an extreme heat event so it's slightly different but certainly there's considerable damage."

High winds blew out gym windows at Loreto College

The wide damage trail led to congested roads for commuters, especially in Adelaide's eastern and hills suburbs.

Some traffic lights were out due to power failures.

Damage included the gym at Loreto College at Marryatville in the eastern suburbs, where the high winds blew out windows.

Trees fell onto cars, including one being driven along Sunnyside Road at Glen Osmond.

More than 60,000 properties were without electricity because of fallen power lines and some were expected to remain without their supply until late in the day.

Rail services faced delays when manual signalling was needed due to power outages.

Meanwhile, some bus services had to be rerouted due to road closures or dangers and blockages on the O-Bahn busway track and there were slight delays to some tram services.