  Cosmological models with an inhomogeneous viscous dark fluid, coupled with
dark matter in the Friedmann- Robertson-Walker (FRW) flat universe, are
considered. The influence of thermal effects caused by Hawking radiation on the
visible horizon is studied, in connection with the classified type I and type
III singularities which are known to occur within a finite amount of time.
Allowance of thermal effects implies that a transition to a type II singularity
can take place, in a finite time. We take into account a bulk viscosity of the
dark fluid, observing the equation of state in the case of radiation, and find
that there is a qualitative change in the singular universe of type I: it may
pass into a singularity of type III, or it may avoid the singularity at all.
