This work presents a study of galactic outflows driven by stellar feedback. We extract main-sequence disc galaxies with stellar mass 10(9) 150 km s(-1). Although supernova-driven galactic winds in the EAGLE simulations may not entrain enough gas with T <10(5) K compared to observed galaxies, we find that gas temperature is a good proxy for the presence of outflows. There is a direct correlation between the thermal state of the gas and its state of motion as described by the sigma-distribution. The following equivalence relations hold in EAGLE: (i) low-sigma peak double left right arrow disc of the galaxy double left right arrow gas with T <10(5) K; (ii) high-sigma tail double left right arrow galactic winds double left right arrow gas with T >= 10(5) K.