Rapid Fire
Black Rain over Tehran
- 12 Mar 2026
- 3 min read
Residents of Tehran experienced a phenomenon known as “black rain” after Israeli strikes on Iranian oil facilities caused large fires, sparking severe environmental and public health concerns.
Black Rain
- About: Black rain is rainfall contaminated with soot, ash, oil particles, and industrial chemicals released into the atmosphere by large fires or industrial accidents. As raindrops fall, they collect these pollutants, making the rain appear dark and oily.
- It can occur after oil facility fires, refinery explosions, wildfires, volcanic eruptions, or nuclear fallout.
- Formation of Black Rain: Explosions at oil storage and refining facilities ignited massive fires, releasing toxic hydrocarbons, sulfur oxides, and nitrogen compounds along with smoke and particulate matter into the atmosphere.
- Rainfall passing through this polluted air absorbed the contaminants and fell as black precipitation (black rain) over Tehran.
- Immediate Health Risks: The World Health Organisation (WHO) confirmed that the black rain poses a "real danger," primarily to respiratory health. Health risks include headaches, skin and eye irritation, difficulty breathing, and potential chemical burns upon contact.
- Long-term exposure to compounds like benzene, found in petroleum mixtures, is known to increase cancer risk.
- Environmental Impact: Beyond the immediate crisis, there is a risk of "forever chemicals" (Per- and Polyfluoroalkyl substances) from firefighting foam contaminating groundwater and soil. Furthermore, acid rain could accelerate the corrosion of buildings, and toxic compounds may enter the food chain through contaminated vegetation.
- Historical Precedent: The most infamous example of black rain occurred after the nuclear attack on Hiroshima, where radioactive materials mixed with precipitation, spreading contamination far beyond the blast zone.
| Read More: Conflict Zones in the US - Israel - Iran War, Forever Chemicals, Acid Rain. |
