March 11, 2026
WHO raises alarm over health risks from oil-contaminated 'black rain' in Iran
The WHO has warned of health risks after oil-tainted 'black rain' fell in Tehran, following a refinery strike that covered the city in thick black smoke. Residents are advised to take precautions as authorities assess the situation.
March 11, 2026

Tehran — The World Health Organization (WHO) has issued a warning regarding potential health hazards following reports of oil-contaminated 'black rain' in Iran. This development comes after a refinery strike led to thick black smoke blanketing Tehran, according to the WHO.
The organization stated that the rain, tainted with oil residues, was observed in the Iranian capital after the strike at a local refinery caused significant air pollution. The resulting smoke clouded the city, raising concerns about the quality of air and water, as well as the possible impact on public health.
WHO officials highlighted that exposure to such pollutants can pose serious health risks, especially for vulnerable groups such as children, the elderly, and individuals with pre-existing respiratory or cardiovascular conditions. The agency has advised residents to take precautions, including minimizing outdoor activities and using protective masks where possible.
Health authorities are closely monitoring the situation and assessing the extent of contamination. The WHO emphasized the importance of swift action to address the environmental and health consequences of the incident.
As per the WHO, oil-contaminated rain can introduce hazardous substances into the environment, potentially affecting drinking water supplies and agricultural land. The organization urged local authorities to conduct thorough assessments and implement measures to safeguard public health.
The refinery strike, which triggered the release of thick black smoke, has drawn attention to the need for improved safety protocols and environmental controls at industrial facilities. The WHO reiterated its commitment to supporting Iranian authorities in managing the health risks associated with the incident.
Further updates are expected as investigations continue and more information becomes available regarding the scale of the contamination and its impact on the population.
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