In the streets as people were walking around enjoying the day and eating outside at the tables outside the restaurants, and then it could be heard. It started out faint, like a approaching storm? But then it got closer, and it would have been realized that their was a sandstorm tearing through the streets. The sandstorm itself was very odd, as not only it moved remarkably fast but it was spherical in shape too, and could be seen to have an beginning and end. People tried to move out of the way and some were caught in the sandstorm and, they would have sworn that something was in the sandstorm, but then it moved too quickly to be sure. To those the sandstorm briefly enveloped, it would leave hot, gritty sand in every place it could have been and left sand in the food of people who were eating outside if the sandstorm passed by them.
However, to ember this was fun! She had rode on dusty all the way since the desert for the goal of finding a symbol resembling the one she had carried on her from the desert. However she just came out of a particularly cold mountain pass so she had a sandstorm to keep her warm and to completely hide her from outside view. But she liked it going on around her so much that she decided to keep it going for the rest of the way. She was surprised though that she started to encounter people, but took it as a sign that she was in a town and knew that the next town she passed into could be the one with the origin of the symbol in it.
So she rode around looking for symbols to match the one she had with her, enjoying the ride. But to an outside viewpoint the sandstorm seemed to have driven through the town without purpose, doing loops or going in random patterns. However it was becoming harder for ember riding on dusty in the middle of the sandstorm to maneuver around the obstacles in the street, so eventually someone or something was going to have a close call with her, or even get hit.