People living near a nuclear power station in the north of Japan have been told to leave their homes after another explosion.
The power station was damaged when a massive earthquake hit the country on 11 March which killed thousands of people.
Since then there have been four explosions at the plant which have caused dangerous radiation to leak out. This snap shows what the power plant looked like before and after the quake.
Scientists think that the explosions keep happening because the power station's cooling systems were damaged during the earthquake.
Experts have been trying to fix the leaks but new explosions are making it too dangerous for them to work. Helicopters are also being used to try and cool down the reactors.
Everyone who lives near the site has been evacuated to a safe area and are being checked to make sure that they haven't been hurt by the radiation.
This worker is using a special machine to measure how much radiation people have been in contact with. High levels can make people really ill.