The National Fire Danger Rating System (NFDRS) is a system that allows fire managers to estimate today's or tomorrow's fire danger for a given area. It combines the effects of existing and expected states of selected fire danger factors into one or more qualitative or numeric indices that reflect an area's fire protection needs.
In 2014, RMRS fire danger rating system developers sought and gained approval to update the U.S. National Fire Danger Rating System (NFDRS). This system has remained static for nearly 40 years, despite many scientific and technological advances that could significantly improve the system. The updated version of the National Fire Danger Rating System, also known as NFDRS 2016, was completed during the fall of 2017 and went into service during the 2018 fire season. It is much simpler and more automated than previous versions of the system.