An article by Zach Beauchamp in ThinkProgress explores the effect of income inequality on disaster impacts.
Inequality was, the researchers found, the single most important predictor of vulnerability to storm damage — variation in the wealth of individual counties alone explained 12.4 percent of the differences in the impact of natural disasters between counties.
And from Kathleen Tierney at the University of Colorado:
The lack of affordable housing in U.S. metropolitan areas forces the poor to live in substandard housing that is often located in physically vulnerable areas and also to live in overcrowded housing conditions. Manufactured housing may be the only viable housing option for people with limited resources, but mobile homes can become death traps during hurricanes and tornadoes…disaster evacuation scenarios are also based on other assumptions, such as the idea that in addition to having their own transportation, households also have the financial resources to leave endangered communities when ordered to do so. This is definitely not true for the poor.