Hi Tanisha, Great question! The solution must solve a challenge that is aligned with at least one of the phases of the disaster life cycle (mitigation, preparedness, response, recovery) and it must focus on a challenge that is present in one or more types of natural disaster (e.g. hurricanes/cyclones; wildfires; floods; earthquakes; drought; etc.).
The project should be focused on natural disasters. This means it shouldn't be a directly human-caused disaster (oil spills, gas leaks, etc.), but humans do impact the physical environment in many ways that cause natural disasters. Depending on your project, it is best to do research and explain your reasoning within your submission.