The largest city in Australia was shrouded in smoke on Tuesday, causing dozens to seek medical treatment after wildfires pushed the air quality to beyond "hazardous" levels across the region. Residents of Sydney woke to the city skyline obstructed with a think haze that made it difficult to see the city's high-rise buildings. Most of the coastal areas of New South Wales, where Syndey is located, are under very high fire danger with 48 fires burning across the state An image taken from a plane shows the extent of the haze throughout the entire metropolitan area. The thick layer of smoke caused dozens of area residents to require medical assistance as the city's air quality ended up in the top 25 worst rankings on the World Air Quality Index.