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

Reuters
Mar 10, 2026

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


The World Health Organization warned on Tuesday ‌that the "black rain" and toxic compounds in the air in Iran after strikes on oil facilities could cause respiratory problems, and it backed Iran’s advisory urging people to remain indoors.
 
The U.N. health agency, which has an office in Iran and works with authorities ​on health emergencies, said it has received multiple reports of oil-laden rain this week. Tehran was choked ​in black smoke on Monday after an oil refinery was hit, in an escalation ⁠in strikes on Iran's domestic energy supplies as part of the U.S.-Israeli campaign.
 
"The black rain and the acidic rain ​coming with it is indeed a danger for the population, respiratory mainly," WHO spokesperson Christian Lindmeier told a press ​briefing in Geneva, adding that Iran had advised people to stay indoors.

PEOPLE SHOULD PROTECT THEMSELVES

Asked whether the WHO backed that advice, he said: "Given what is at risk right now, the oil storage facilities, the refineries that have been struck, triggering fires, bringing serious air ​quality concerns, that is definitely a good idea."
He said the strikes had caused "the massive release of toxic hydrocarbons, ​sulfur oxides and nitrogen compounds, into the air". Scientists said inhaling or touching the smoke or particles could cause headaches, skin ‌and eye ⁠irritation, and difficulty breathing. Longer-term exposure to some of the compounds increases the risk of some cancers, they added.