Figure 1.24: Displacement exceedance for major hazards in Indonesia Source: IDMC, with UNISDR data Figure 1.25: Multi-hazard displacement exceedance curves Source: IDMC, with UNISDR data This type of information gives national policymakers a sense of the scale of the problem and its associated risk. It is a first step toward more riskinformed preparedness and response planning. The type of supplies needed, assessments of evacuation shelter capacity and financial contingency planning for reconstruction and rehabilitation depend on more in-depth assessments once the scale is understood and hotspots identified. Combined displacement exceedance curves for various hazards show that countries with very different vulnerability and exposure profiles all face significant displacement risk, even if it is associated with different hazards and return periods (see figure 1.24). Ethiopia might expect an event that displaces at least 1.5 million people once in 100 years. In Sri Lanka, the same return period puts the displacement exceedance at around 240,000 people, and an average of at least 30,000 people displaced every 10 years. The vast scale of disaster displacement risk becomes very visible in these curves, and it can be expected to grow as economic and demographic concentration continue to drive exposure, while at the same time environmental degradation and climate change, weak governance, limited capacity and persistent inequality and poverty increase vulnerability. As such, the humanitarian resource gap that already exists can be expected to grow unless the causes and structural drivers of exposure and vulnerability are addressed globally and particularly in hazard-prone regions. ON THE GRID: Global internal displacement in 2016 47