Western Australia has recorded 2,365 new cases of COVID-19 along with one death.
A woman aged in her 40s with other underlying health conditions passed away in hospital, health officials said.
The number of people in hospital has also jumped to 36, up from 26 yesterday, but none of them are in ICU.
It is the fifth consecutive day the number of new cases has exceeded 2,000, and there are now 13,486 active infections in the state.
A record number of the new cases were detected by rapid antigen tests, with 1,123 reported in the 24 hours to 8pm last night.
The remaining 1,242 cases were reported from 8,828 PCR tests.
WA's third dose vaccination rate for people aged 16 and over is now 66 per cent.
Parents split over new school rules
WA's Chief Health Officer yesterday announced relaxed close contact rules meaning if a child is deemed a close contact, that will no longer automatically apply to their parents.
Among the crowds at a bustling Perth Zoo on Monday, as families took advantage of the public holiday, there was a mixed response to the change.
"Obviously with small children I've got to be at home with them anyway, but it means that my husband is able to continue working," said Alison Pascoe, who was visiting the zoo with her two children.
"It's made it a bit easier for us to still live quite normally, keeping in mind that we've got to keep everyone safe in the community."
But others were unsure about the change.
"I'm a little bit edgy about that," Nick Tognela said.
"If they're a close contact, you're a close contact."
For Gemma Clarkson and her children, who are in kindy and year 1, the rules were a lot to keep up with.
"It's all a bit confusing. I know we're all trying to figure out what the rules are and where it applies," she said.
"I'm still not sure what the rules are, to be honest."
McGowan leaves WA for first time in two years
The latest COVID-19 developments in WA came as Premier Mark McGowan testified in the Federal Court in a defamation proceeding brought by mining billionare Clive Palmer.
Speaking outside the court this morning, he said it was "great" to be in New South Wales and see his parents.
"I haven't left the state of Western Australia for two years, so it's a bit of a different experience to go somewhere else," he said.
Mr McGowan continued to defend WA's hard border, saying it delivered "outstanding" health and economic outcomes.
He denied reports he would wear full PPE, including goggles and gloves, to visit Dumas House later this week so he could attend National Cabinet via video link, saying he would only wear a mask.
Submarine decision criticised by WA government
Prime Minister Scott Morrison today announced a new submarine base would be built on Australia's east coast to support the nation's future nuclear-powered fleet.
Australia's fleet of six Collins-class submarines is currently based at Perth's HMAS Stirling, also known as Fleet Base West.
"This is about additional national capacity, not relocating any existing or planned future capacity for Fleet Base West," Mr Morrison said.
"Fleet Base West will remain home to our current and future submarines, given its strategic importance on the Indian Ocean."
But state minister Stephen Dawson said the announcement was a sign the Commonwealth had "given up on Western Australia".
"They've told us for a long time to expect that we would get an investment in Western Australia, but time and time again, the money goes elsewhere, the jobs go elsewhere," he said.
"We have a trained, dedicated workforce in Western Australia who are very capable of doing the jobs.
"It's very disappointing."
