A severe thunderstorm warning for Perth and surrounding regional areas on Monday has been cancelled but residents in other parts of WA are still being warned to expect damaging winds, large hail and heavy rainfall.
The warning comes as lightning struck two homes in Perth on Monday morning.
The Bureau of Meteorology has issued a severe thunderstorm warning for the Gascoyne, central west, lower west, great Southern and central Wheatbelt.
The thunderstorm is forecast to hit an area bounded by Collie to Mandurah to Gingin to Moora to Paynes Find to Mount Jackson to Lake King to Katanning to Collie.
Towns that could be affected include Dalwallinu, Southern Cross, York and Narrogin.
A BoM spokesman said the weather pattern was not unusual for this time of year, but severe weather may occur in some parts of the warning area.
Storms with thunder and lightning bolts had rocked Perth on Monday morning when two Swan View homes were struck by lightning within an hour of one another.
The first bolt stuck a residence near the intersection of Morrison Road and Stirling Close at around 6.30am and caused damage to its roof and wiring estimated at $70,000.
Homeowner Ozzie told Radio 6PR's Lisa Barnes he went outside to put the windows up in his car. As soon as he got back inside there was a terrific bang that shook the house.
"The noise was incredible and it lit up the bedroom," he said.
"It hit the corner of the house just above where I had been standing by the car only a minute earlier."
The strike blew out tiles, melted wiring in the airconditioning, fused the lights and power points and blew out the meter box.
Smoke filled the house.
"There was also the smell of burning plastic. We weren't sure if there was a fire in the ceiling, so we called the fireys," Ozzie said.
"It was incredible - the strike actually lifted the roof and moved the tiles sideways.
In the backyard, wiring that anchored netting over fruit trees was melted and a padlock on the gate was welded shut.
Ms Barnes said Ozzie was going to sort out his insurance and then buy a lotto ticket.
A minor strike hit the other home near Bladon Way about 7.30am and caused wiring damage estimated at $5000.
Another eyewitness, Stewie, told 6PR that the noise shook him and set off his car alarm. He went outside and found the neighbour's palm tree alight.
A Department of Fire and Emergency Services spokeswoman said nobody was injured.
"There was a bit of smoke with the first strike, but a crew from Midland was quickly on the scene," she said.
It is understood crews from electricity providers are now ensuring the residences are safe.
The Bureau of Meteorology had forecast a medium chance of showers with possible heavy showers in the hills.
At 6am the skyshow was in full effect, with lightning clearly visible over the eastern suburbs.
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Gusty wins and hail are said by the BoM to be possible in the north-eastern suburbs in the afternoon, with a maximum temperature forecast of 33 degrees.
Tuesday's Australia Day public holiday is predicted to be 31 and cloudy, with warm weather forecast for the rest of the week and no more rain on the radar until Saturday.
Rest of this week's weather:
Wednesday: 31, partly cloudy.
Thursday: 34, mostly sunny.
Friday: 36, partly cloudy.
Saturday: 31, possible shower or storm.
Sunday: 29, partly cloudy.