The U.S. Census Bureau has released an interactive map showing the threat level in every census tract in relation to natural disasters such as earthquakes, fires, floods, severe storms. The map measures what percentage of the local population is considered “socially vulnerable” to a disaster, particularly if high poverty levels, crowded housing, a large elderly population, difficult vehicle access or large communication barriers are present. The largest source of risk in many areas is earthquakes, though some are vulnerable to wildfires. The Federal Emergency Management Agency (FEMA) recommends making a plan for a natural disaster, which includes evacuation routes, emergency supplies, and a basic disaster kit.