Dumsor is a funny word that can mean some big problems in Ghana. It happens when there is not enough electricity to go around for everyone. Just think of electricity like the energy that powers your toys, your TV or your night-light in your bedroom. When there is not enough electricity, it can cause big trouble. People can't turn on their lights or their fans, and their phones or computers might run out of power. Even the stores and businesses can't work like they usually do.
So, when there is dumsor, people have to be very careful about how they use electricity. The government might even turn off the electricity in some places for a little while to help make sure there's enough to go around in other places. This is called "power rationing." It's like sharing a toy; sometimes you have to take turns playing with it if there aren't enough toys for everyone.
Sometimes, dumsor can happen because there isn't enough water to make electricity from a big dam or if there's an issue with the electrical wires. But don't worry, the grown-ups are working hard to fix it so everyone can have the electricity they need to live, learn and play comfortably.