In this paper, we present a method of analysis by which the Maxwellianized electron cascade equations are coupled to the fluid‐mechanics conservation equations for the purpose of investigating the effect of a shock‐induced flow field on breakdown. A particular example of breakdown initiated behind a previously existing blast wave in argon is investigated. It is shown that the breakdown process may be hindered by the rapid hydrodynamic cooling due to geometrical expansion of the mass element under consideration.