'Stay Indoors': Smoke Haze Suffocates Sydney As Air Quality Plunges

Sydneysiders are urged to take health precautions amid poor air quality as residents woke to smoky, hazy conditions blanketing the city.

Smoke from the Gospers Mountain bushfire in the Hawkesbury, to the city's north west, has blown over the metro area with the Bureau of Meteorology warning conditions won't ease until evening.

Poor air quality alerts have been issued and residents are urged to stay inside with windows and doors shut.

Health authorities advise residents avoid strenuous physical activity outdoors -- particularly those with breathing, asthma or lung conditions.

The smoke haze isn't expected to clear until a southerly wind change arrives on Tuesday evening.

Temperatures in Sydney are set to hit 32 degrees before dropping.

Meanwhile, total fire bans are in place for seven areas across NSW, including Sydney, as the state heads into the first of two "tough days" this week.

There are 51 grass and bush fires still burning around NSW, all of which are at "advice" level, with more than 1300 firefighters working through the night in a bid to contain dozens of blazes still out of control.



Fire Bans In Place Ahead Of Tough Day For Firies

Firefighters are on high alert with hot, dry and windy conditions posing a risk to residents around the country.

Six lives and 530 homes have been lost since the state's bushfire season hit some weeks ago, with more than 420 properties destroyed in the past fortnight alone.

With AAP.