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  • Fri, Apr 2026

WHO Warns of Health Risks from “Black Rain” in Iran

WHO Warns of Health Risks from “Black Rain” in Iran

WHO warns of health risks from “black rain” in Iran after oil facility strikes, urging residents to stay indoors as toxic fallout threatens respiratory health.

The World Health Organization (WHO) has endorsed Iran’s recommendation for residents to stay indoors, warning that “black rain” and toxic air following strikes on oil facilities pose serious respiratory risks.

WHO Advisory

WHO spokesperson Christian Lindmeier told reporters in Geneva that the combination of black rain and acidic fallout is “indeed a danger for the population, respiratory mainly.” The agency’s office in Tehran has received numerous complaints of oil‑laden rain since U.S.–Israeli strikes began on February 28.

Strikes on Oil Facilities

At least four oil facilities in Tehran have been hit, choking the capital with smoke and haze. Photos from Shahran showed scorched structures, burning tankers, and firefighters battling massive blazes. The Israel Defense Forces claimed responsibility for striking “fuel depots” near Tehran, releasing images of damaged refineries.

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Scientific Concerns

Experts warn the pollutants released could be unprecedented. Peter Ross of the Raincoast Conservation Foundation explained that petroleum fires emit hydrocarbons, sulfur oxides, and nitrogen compounds that can cause dizziness, unconsciousness, or even death. Prolonged exposure raises risks of chronic respiratory disease and cancer.

Akshay Deoras, a research scientist at the University of Reading, noted that black rain results from “atmospheric scavenging,” where raindrops collect airborne contaminants. While dry conditions are forecast for the week, he cautioned that prolonged exposure to toxic air remains the greater health threat.

What Is Black Rain?

Black rain occurs when rainfall mixes with soot, ash, oil droplets, or industrial pollutants, giving it a dark, oily appearance. It has been documented after refinery explosions, wildfires, volcanic eruptions, and nuclear fallout.

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Health Effects

  • Respiratory issues: Irritation, bronchitis, asthma flare‑ups.
  • Skin and eye irritation: Rashes, burning sensations.
  • Toxic exposure: Hydrocarbons and heavy metals can be harmful.
  • Long‑term risks: Chronic respiratory disorders, cancer, and contamination of crops, soil, and water supplies.

With Tehran blanketed in haze and residents reporting burning smells and blocked sunlight, WHO’s warning underscores the gravity of the crisis. As fires continue at oil facilities, the health risks from black rain highlight the devastating human cost of the escalating U.S.–Israeli campaign in Iran.

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