With high temperatures and an increased amount of traffic, dust concentrations were also elevated in the atmosphere on Monday, the air quality monitoring network of the labour inspection department warned in the morning.
According to the department, the dust contains small particles which when inhaled may have a negative effect on human health.
Therefore the public, particularly vulnerable groups such as the elderly, children and sick people should avoid being outdoors until the levels drop.
The small particles with a diameter of less than 10 μm (PM10) should not exceed 50 μg/m3 (microgrammes per cubic metre).
However, at 9.45am concentrations were 118.6 μg/m3 in Nicosia, 113.3 μg/m3 in Paphos, 76 μg/m3 in Larnaca, 62.6 μg/m3 in Limassol and 62.3 μg/m3 in Paralimni.