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WHO warns of health risks from 'black rain' in Iran

The World Health Organization cautions Tehran residents to stay indoors due to oil-contaminated black rain containing toxic pollutants harmful to respiratory health.

  • On March 10, the World Health Organization warned that black rain in Iran could cause respiratory problems and backed Iran's stay-indoors advisory after receiving multiple reports this week.
  • Explosions at fuel storage facilities released hydrocarbons and sulfur and nitrogen oxides that rained out as oil-laden, acidic black rain after Israeli strikes hit Shahran and Aghdasieh oil depots in Tehran.
  • Witnesses in Tehran reported oil-contaminated rain causing headaches and breathing problems, while rain acidity measured a pH of about 4 to 4.4, WHO staff confirmed.
  • The Iranian Red Crescent and Tehran governor advised people to wear masks, avoid air conditioners, and clean indoor surfaces amid toxic black rain, as authorities warned of health risks from the fallout.
  • Experts caution that inhaled PM2.5 and PAHs link to cancers and cardiovascular risks, while deposited pollutants threaten aquatic ecosystems and drinking water sources; oil prices surged past $100 and nearly $115 per barrel.
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70 Articles

Left

Geneva. The World Health Organization (WHO) warned yesterday that the “black rain” and toxic compounds present in the air in Iran following attacks on oil facilities could cause breathing problems, and urged the population to stay in their homes.

·Mexico
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Lean Left

Shortly after plumes of smoke rose up in the sky of Tehran, a black rain fell on the city. Then, residents noticed that a thick and oily film had been deposited on their cars and houses.

·Montreal, Canada
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Center

Air quality has deteriorated in Iran following US and Israeli attacks on oil facilities.

·Finland
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Lean Right

The World Health Organization has warned of the dangers of black rain following an attack on an oil depot in Iran, potentially impacting water resources and the health of Iranians who are already facing severe water shortages.

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La Repubblica broke the news in Turin, Italy on Monday, March 9, 2026.
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