Dust storms can be very dangerous. When a dust storm hits, it makes it difficult to see. If you are outside during a dust storm, you may not be able to see more than a few inches in front of you. When a dust storm is approaching Phoenix, the local weather stations start broadcasting warnings for people to get off the street. People are told to park their cars, so they don't crash. Airplanes are not allowed to take off from or land at the Phoenix airport because the pilots cannot see well.