  We present long slit spectrophotometry of two HII regions: TOL2146-391 and
TOL0357-3915. We performed a detailed analysis that involves abundance
determinations relaxing the assumption of homogeneous temperature. The
temperature inhomogeneities values, t^2, were obtained through two methods: (i)
comparing abundances from oxygen recombination lines to abundances from
collisionally excited lines and (ii) by using the line intensity ratios of a
set of HeI lines together with the HELIO10 program. We find that the HELIO10
program is a good alternative to obtain a t^2 value in photoionized regions
where recombination lines of heavy elements are not available. We have plotted
27 high and low metallicity HII regions in an oxygen degree of ionization
versus t^2 diagram; we find areas populated by HII regions and areas void of
them; the physical characteristics of each area are discussed. In addition, an
average t^2 value can be determined for the objects in each area. We propose to
use this <t^2> value for the cases where a direct measurement of t^2 cannot be
determined
