Shamal is a word that means "north" in Arabic, but it is also commonly used to describe a type of wind in certain parts of the world. When the shamal wind blows, it can bring a lot of sand and dust with it, which can make it hard to see and hard to breathe. It usually happens during the hot summer months, and it can last for days or even weeks.
Think of it like when you blow on a piece of paper or a feather - the wind can make it move and fly around. But when the shamal wind blows, it can pick up a lot of sand and dust from the ground and make it fly around too. It's like a big gust of wind that brings a lot of sand and dust with it.
People who live in places where the shamal wind is common have to be prepared for it. They might wear special masks or cover their faces to protect their eyes and noses from the sand and dust. They might also have to stay inside more often during these times, because it can be dangerous or unhealthy to be outside when the wind is blowing so strongly.
So, in summary, shamal is a type of wind that brings a lot of sand and dust with it, and it can make it hard to see and breathe. People who live in places where the shamal wind is common have to be prepared for it and take precautions to stay safe.