In 1986, there was a big accident at a place called Chernobyl, which is in Ukraine. It had a big power station where they made electricity. Something went wrong and there was a big explosion. This explosion made a lot of dangerous stuff called radiation. This radiation is like invisible rays that can hurt people if they get too much. When this happened, it was not safe for people to stay there, so they had to leave.
People who lived near Chernobyl had to leave their homes because the radiation made it dangerous to stay. The government had to make a big zone where no one was allowed to go because of the radiation. This is called the exclusion zone. The radiation can make people sick, so it was very important to stay away from it. Even today, many years later, it's still not safe for people to live there.
Some people who helped in the beginning, like the firefighters and workers at the power station, got very sick because they were close to the radiation. They had to go to the hospital and some of them got very, very sick. The radiation can make people's bodies very weak and it's very hard for them to get better. Even some animals and plants were affected by the radiation and had to leave the area, too.
Because of the radiation, the people who were affected and their families had to move to different places where they could be safe. They couldn't go back to their homes for a long time. Scientists are still studying the effects of the radiation on the people and animals. And they're working hard to make sure that something like this doesn't happen again.
In conclusion, the Chernobyl accident caused a lot of people to leave their homes and made some people very sick because of the radiation. The government had to make a special zone where no one was allowed to go to keep people safe. It's important for everyone to be careful with things that can be dangerous, like radiation, so we can stay safe and healthy.