Dubai: The black smoke billowing over Dubai's skyline on Wednesday increased the concentrations of harmful pollutants within the city's urban environment.

The toxic emissions - including sulphur dioxide, carbon monoxide, carbon dioxide and phosphorus compounds - will be inhaled by people for days. The city and surrounding habitats will also be coated by residue when the particles settle.

Air quality over the Al Quoz area has worsened due to the fire, prompting doctors to warn the public who live or work in nearby areas to protect themselves.

Authorities say the fire pumped carbon monoxide and carbon dioxide into the air. Carbon monoxide, a tasteless, odourless and colourless gas, is highly toxic and can be deadly. It is commonly used in packaging.

Dr Bassam Mahboub, vice-president of the UAE Respiratory Society, advised residents to stay indoors long after the fire has died.

"People should take care until 12 to 24 hours after the fire has gone out. Avoid going out and use recirculating air-conditioners. Keep windows closed," he added.

He said people with respiratory diseases, such as asthma and emphysema, were at risk.

Anyone who exhibiting symptoms of carbon monoxide poisoning are advised to seek medical assistance immediately.

Low-level exposure to carbon monoxide may cause flu-like symptoms, depression, confusion, headaches and lethargy.