The Smell Of Approaching Rain

It's a real thing:

There's a name popularly ascribed to this range of post-precipitation scents: petrichor. Petrichor was first described in 1964 by mineralogists Isabel Joy Bear and R. G. Thomas of Australia's Commonwealth Scientific and Industrial Research Organization. As they defined it, it occurs when airborne molecules from decomposing plant or animal matter become attached to mineral or clay surfaces. During a dry spell, these molecules chemically recombine with other elements on a rock's surface. Then when the rains came, the redolent combination of fatty acids, alcohols and hydrocarbons is released.