Dangerous Black Rain Falls on Iran After Oil Facility Strikes

Toxic rainfall contaminated with chemicals and soot has fallen near Tehran following military strikes on Iranian oil facilities. Health officials are warning residents about serious health risks including breathing problems and skin burns from the acidic precipitation.

Hazardous precipitation contaminated with toxic chemicals has fallen near Tehran after military strikes targeted Iranian petroleum facilities, creating serious public health concerns according to international health authorities.

Citizens in Iran’s capital reported eye irritation and respiratory difficulties when the contaminated, dark-colored rainfall occurred following attacks on multiple fuel storage sites and a petroleum refinery last week.

Dark smoke columns have been observed throughout the region during two weeks of ongoing conflict, as Iran responds to military strikes by launching drone and missile attacks against oil and gas infrastructure belonging to neighboring Persian Gulf nations.

According to experts, rainfall can remove dangerous chemicals from the air relatively quickly, though individuals who come into contact with contaminated precipitation should take safety measures to prevent immediate and future health complications.

This phenomenon happens when particles of soot, ash and harmful chemicals mix with atmospheric moisture before returning to the ground during rainfall. Such events typically follow fires at petroleum refineries or oil fields, and may also result from forest fires, volcanic activity and industrial contamination.

Experts explained that tiny soot particles developed when petroleum hydrocarbons underwent incomplete combustion in Iran. Oil fires also create substances known as polycyclic aromatic hydrocarbons, or PAHs, along with harmful gases including sulfur dioxide and nitrogen oxides that produce acid rain, according to Peter Adams, who teaches civil and environmental engineering at Carnegie Mellon University.

These microscopic soot particles, measuring roughly 40 times thinner than human hair width, can penetrate deeply into lung tissue and enter blood circulation, potentially causing respiratory and cardiac issues that may result in early death, experts warned. Contact with PAHs may elevate cancer risks.

The World Health Organization and Iranian health and environmental agencies recommended that people remain inside and use protective masks. Officials cautioned that the precipitation contained high acid levels that could cause skin burns and respiratory damage.

“We can definitely expect acute health effects from an event like this,” said V. Faye McNeill, a chemical engineering professor at Columbia University who specializes in atmospheric chemistry.

Standard air quality problems can already trigger health complications and increase hospital admissions, particularly affecting seniors, young people and those with existing medical conditions, she explained. “But this is a higher level, so there likely are health problems going on right now because of it.”

Some Iranian residents worry that the contaminated rainfall, which also includes heavy metals, might pollute water supply reservoirs and local waterways.

Fuel storage tanks typically burn out within hours. However, oil fields can continue burning for months, similar to what occurred in Kuwait during the Gulf War 25 years ago, Adams noted.

For fires that extinguish more rapidly, most particles and chemicals will scatter in the wind and clear from the atmosphere within approximately three to seven days, Adams explained.

“So if we don’t create more problems, at least what’s in the atmosphere is going to go away,” even though long-term health dangers remain, Adams stated.

“But we don’t know what’s going to happen with future strikes and whether other tanks will be struck or whether oil fields will be struck,” he continued. “I’m less concerned about longer-term or regional stuff, but it’s a real mess for the people in the immediate vicinity.”