Habitat Equivalency Analysis (HEA), borrowed from a common Natural Resource Damage Assessment (NRDA) approach for quantifying environmental harm and restoration, is a tool that has been used to quantify forest fire habitat damages. HEA involves determining a baseline for habitat services that would have occurred in the absence of the fire, and determining the lost services from the time of the incident until ecosystem functions have been recovered to baseline conditions. Depending on the habitat being evaluated, recovery may take a century or more for old growth forests. This paper reviews and identifies critical issues that may affect the estimate of lost services following high- severity fires, including potential approaches for dealing with uncertainty. Some items discussed can be addressed in the short-term while others represent research and tool development opportunities.