Sydney has awoken to a thick haze of smoke over the CDB and the eastern suburbs and another day of poor air quality as fire hazard reduction burns continue.

The NSW Rural Fire Service is racing to complete the burn-offs in the north, west and south ahead of the weekend when temperatures are set to rise to the low 30s.

“The smoke will begin to clear across the morning, however, with further burning scheduled smoke is expected to remain over parts of Sydney and the Central Coast until late this week,” the RFS said on Tuesday.

According to the Environment Department website, air quality for Tuesday has been ranked as extremely poor in the city’s east, and poor in the northwest.

Anyone with chest or respiratory issues should consider remaining at home or reducing outdoor activities.

Authorities are making up for lost time after only managing to complete about 24 per cent of planned hazard reduction burns since June.