Australian authorities have warned that massive bushfires raging in two states will continue to pose a threat, despite “catastrophic” conditions easing.

About 150 fires are still burning in New South Wales (NSW) and Queensland, feeding off tinder-dry conditions.

Fifty houses were destroyed or damaged in NSW on Tuesday but no lives were lost, officials said. At one point, fires broke out in suburbs of Sydney.

On Wednesday, blazes caused fresh emergencies in Queensland.

“The conditions are of concern to us,” Premier Annastacia Palaszczuk told reporters.

The threat in NSW has been downgraded from catastrophic – the highest level – but officials urged residents to remain vigilant.

“We’ve got the worst of the summer – the worst of the season – still ahead of us as we head into summer,” said NSW Rural Fire Services Commissioner Shane Fitzsimmons.

Australia’s government has often avoided questions on whether climate change could have contributed to the fires, in a response that has drawn criticism.

What’s happening in Queensland?

More than 60 bushfires are burning in the state amid forecasts of high temperatures, volatile winds and dry lightnin

Residents in Noosa North Shore, on the popular Sunshine Coast, were among those to be issued emergency warnings on Wednesday.

A water-bombing helicopter crashed while fighting a fire at Pechey, west of Brisbane, but the pilot survived with only minor injuries.

Officials warned that no significant rain was expected, putting continuing strain on firefighters.

What about NSW?

Mr Fitzsimmons said it was a relief that no-one died on Tuesday given “the enormity of these fire grounds”. About 1.1 million hectares have been scorched in NSW since September.

The worst fires dot NSW from its northern border to a national park north of Sydney. Though perimeters constantly shift, most are in populated coastal zones or further inland.

Since Friday, three people have died and up to 200 homes have been razed.

Flame retardant had to be dropped in Sydney’s northern suburbs as some bushfires approached within 15km (nine miles) of the city centre.

A firefighting plane dropped pink fire retardant in the area between Macquarie University and the Sydney Adventist Hospital in the South Turramurra suburb.

One resident who evacuated, Diksha Anand, told the BBC she had feared losing her house.

Actor Russell Crowe tweeted that his property had been damaged, but he was overseas and his family was safe.