Explosion at Chernobyl: A Disaster With a Long Shadow

Kyiv Region, 26 April 2026 — Forty years after the night that changed Europe, the Chernobyl nuclear power plant remains one of the most radioactive places on Earth. Today, it is not only a symbol of the world’s worst nuclear accident, but also a site at risk again because it lies in an active war zone.

In the early hours of Saturday, 26 April 1986, an explosion hit Reactor 4 at the Chernobyl plant. Witnesses described the destroyed reactor as “the eye of a volcano.” The blast was followed by a second explosion. Workers reported shaking like an earthquake, collapsing roofs in the turbine hall, and black dust filling the air. Sirens soon sounded across the area.

The accident happened during an important safety test. Engineers had turned off automatic shutdown systems. At 1:23 a.m., the test began, but the reactor became unstable. An emergency button was pressed to stop the reactor manually. Instead, the explosions tore the building apart. Several workers and firefighters died in the following weeks and months from acute radiation syndrome.

Despite the danger, authorities tried to prevent panic. In the morning after the explosion, many residents of the nearby city Pripyat continued their normal lives. Children went to school. Local officials told families that planned events should go ahead. Even a wedding scheduled for that day took place.

Only 36 hours later, on Sunday, the official evacuation began. Residents were told it would be temporary—just three days. In reality, most never returned. Today, an exclusion zone of about 1,000 square miles surrounds the plant. Experts estimate the area may not be safe for human habitation for 20,000 years. Visitors and workers can only stay for limited time and must use protective equipment. Radiation is monitored with dosimeters that warn when levels are too high.

The radioactive cloud from Chernobyl spread across Europe. The Soviet Union admitted the accident two days later, but the leader Mikhail Gorbachev spoke publicly only 18 days after the disaster. Doctors later said many people, especially children, did not receive potassium iodide in the first hours after exposure. Years later, thyroid cancer cases increased.

To contain the reactor, thousands of helicopter flights dropped sand and other materials. Hundreds of thousands of “liquidators” were sent to clean up, often without full information about the danger. Some were given only one minute on highly radioactive roofs to move graphite debris. The true long-term death toll remains disputed.

Chernobyl’s legacy is also political. Public anger about the disaster and the cover-up damaged trust and fuelled dissent, especially in Ukraine and Belarus, contributing to the collapse of the Soviet Union.

In 2022, Chernobyl again became a battleground when invading Russian troops held plant staff hostage for five weeks, dug trenches in contaminated soil, and mines were reportedly placed on the grounds. Ukrainian officials reported a spike in radiation levels. The damaged reactor is now covered by a large confinement structure designed to stop radiation leaking, but staff feared the worst when a drone struck near the site. Today, workers continue their shifts under the threat of missile and drone attacks, trying to keep the world safe from another catastrophe.