Amid the hellish smoke scenes - dubbed the 'airpocalypse' - hospital admissions increased, public transport was disrupted, smoke alarms prompted building evacuations, and residents scrambled to buy face masks to afford themselves a better chance of protection from inhaling particles carried in the haze.
Put simply: Sydney is in a climate emergency, and it's not over yet.
"We can not deny that these fires have been going on for weeks and we need to address the causes of them", he said.
Sydney's air quality index readings in some parts of the city on Tuesday were 11 times the recommended safe levels, government data showed.
The AQI provides a general indication of air pollution including visibility levels and the prevalence of particles in the air.
People wear face masks to protect from the pollution around Sydney.
"We are just urging people once again to take these [conditions] seriously", Broome said.
Ms Ley, the member for shires including Albury, Griffith and Murray, also expressed her concern for rural communities in the state, in particular the "people, the landscape, the lifestyle, the future". Smoke from Australia's bush fires engulfed Sydney in a smoke today, creating the most toxic air on the planet. "If you have a heart or lung condition, it is really important to spend as much time indoors while these conditions last".
Unions NSW assistant secretary Thomas Costa says no workers should be forced to be on outdoor job sites amid the haze.
In addition, the New South Wales Ambulance Superintendent Brent Armitage announced Tuesday that the service has been responding to dozens of calls a day related to respiratory health issues.
"Certainly in Sydney we have experienced very poor air quality episodes in the past and the one I'm most aware of is the 2009 dust storm episode, where we had extremely high levels", NSW director of environmental health, Richard Broome, told media.
"(They should) tell bosses they want to leave and we're encouraging employers to let them go".
The smoke has helped firefighters by suppressing blazes amid severe danger ratings across NSW's east but a southerly wind change is likely to partially clear the haze over the course of the afternoon.
The cold front was expected to reach Greater Sydney after 2pm.
"We need to be doing our bit to make sure we mitigate or adapt to these more extreme weather events happening and we do our bit to abate carbon and reduce the impact of climate change".
Mr Fitzsimmons last week said that until a significant easterly breeze arrives the smoke in Sydney will not completely dissipate.