If large-scale hazardous events and outliers are excluded disaster mortality triggered by hydrometeorological hazards can be observed in an upward trend, as shown in figure 15. These variations call for deeper analysis of each sector and kinds of disasters, for informed policymaking. Earthquakes account for the highest number of people potentially exposed, while flooding is the most frequent natural hazard, for which about 1 billion people in 155 countries were potentially exposed in 2015.