NHIE clouds from the LAB (upper panel), from the GASS (middle panel) and from both (lower panel). Every Gaussian, belonging to a NHIE cloud candidate, is represented with the color, corresponding to the sequence number of this component in the ascending list of the values of T_b,0/FWHM² of these Gaussians. The red color corresponds to the highest values of T_b,0/FWHM². The numbers at the color scale below the figure denote the fractions of the length of the list. The thick lines in the upper panel indicate the location of the expanding superbubble shells S1 (dark violet) and S2 (sea green). In the middle panel, the border of the region covered by the GASS is indicated. The arrow on the lower panel points to the cloud with the narrowest lines, reliably detected in both, the LAB and GASS.