PM stands for particulate matter and is a blend of solid and liquid particles lingering in the air.

Fine dust particles have a PM level of 2.5, elevated enough to enter a person’s respiratory system and reach the lungs, the NIH reported. When inhaled, PM2.5 particles can trigger inflammation and stress in the lungs, damaging cells.

Penetration of the particles can also worsen cardiovascular diseases, the NIH reported.

Children, older people, women who are pregnant and people who have been diagnosed with respiratory diseases can be impacted by dust particles.

Windows and doors should be kept closed during dust storms, and air purifiers can be used to remove the particles, according to the NIH.