In this presentation I review some aspects of magnetohydrodynamics in astrophysical environments
that can give rise to transient thermal and non-thermal emission. I focus specifically on the
magnetic transport and reconnection in accretion driven systems, especially the role it may play
in the production of transient multi-wavelength emission in these systems. The discussion related
to magnetic reconnection starts with a brief historical overview, after which some of the latest
results are discussed. It is shown that magnetic reconnection can indeed be a serious contender
for the driving mechanism behind the transient burst-like emission in many accretion driven environments,
from galactic to extra-galactic sources.