  In this work, using the theory of first-order macroscopic crowd models, we
introduce a compartmental advection-diffusion model, describing the
spatio-temporal dynamics of a population in different human behaviors (alert,
panic and control) during a catastrophic event. For this model, we prove the
local existence, uniqueness and regularity of a solution, as well as the
positivity and $L^1$--boundedness of this solution. Then, in order to study the
spatio-temporal propagation of these behavioral reactions within a population
during a catastrophic event, we present several numerical simulations for
different evacuation scenarios.
