For fumigant pesticides, the major exposure pathway is volatilization. Understanding the volatilization process for fumigants is therefore key for reducing potential exposure to bystanders and non-target organisms. In this presentation, the author will discuss factors that influence the onset of volatilization such as surface boundary conditions and atmospheric factors, including temperature inversions. In addition, the state of the science and the feasibility of utilizing currently available tools to support situational mitigation measures will be examined. Currently, these tools include the National Weather Service warnings, which are based on numerical weather prediction models (i.e., MM5, WRF, NAM, or GFS), and regional airshed forecasting programs.