Global warming is predicted to increase the number and severity of extreme weather events. (IPCC 2007) But we can lessen the effects of these disasters. “Critically important will be factors that directly shape the health of populations such as education, health care, public health prevention and infrastructure.” (IPCC 2007) A comprehensive approach to disaster risk reduction (DRR) has been proposed for climate change adaptation. (Thomalla 2006) DRR is cost-effective. One dollar invested in DRR can save $2-10 in disaster response and recovery costs. (Mechler 2005) Disasters occur as a result of the combination of population exposure to a hazard; the conditions of vulnerability that are present; and insufficient capacity to reduce or cope with the potential negative consequences.

By reducing human vulnerability to disasters, we can lessen—and at times even prevent—their impact. Vulnerability may be lessened by: 1) reducing human exposures to the hazard by a reduction of human vulnerability, 2) lessening human susceptibility to the hazard, and 3) building resilience to the impact of the hazard. (Keim 2008) Public health disasters are prevented when populations are protected from exposure to the hazard. Public awareness and education can be used to promote a “culture of prevention” and to encourage local prevention activities. Public health disasters may also be mitigated through both structural and social measures undertaken to limit a health hazard's adverse impact. (IPCC 2007) Community-level public health can play an important part in lessening human vulnerability to climate-related disasters through promotion of “healthy people, healthy homes and healthy, disaster resilience communities.” (Srinivasan 2003)