Definition - What does Irreparable Harm mean?
Irreparable harm is damage or injury so severe that there are no known ways to fix the problem or restore the conditions that existed before the harm, even with unlimited funding. Parties who commit irreparable harm can be sued in a court of law for damages. People who believe a party is about to commit irreparable harm can also seek injunctive relief from the court against the offending party.
Justipedia explains Irreparable Harm
Examples of irreparable harm include the leveling of a building, the polluting of a reservoir, the causing of unfixable bodily injuries such as permanent paralysis, etc. In the case of the polluting of a reservoir, if it was accidentally done by a company, then that company could very well face a lawsuit. Such damage could result in millions of dollars worth of losses, and the reservoir may have to be abandoned as a source of drinkable water.