Density (left column) and temperature (right column) fields in the equatorial plane for the MHD run C1 (upper pannel) and the hydrodynamical run C2 (lower panels). The figures illustrate the multi-phase nature of the interstellar medium. Most of the volume is filled by warm neutral gas with temperature of about 8000 K. A tiny fraction is occupied by the hot phase at temperature larger than 10⁶ K.