I never knew there was a word for the smell of the earth after the first rain on dry ground. But this morning I learned that yes, in fact there is: petrichor, derived from the Greek petra (stone) + ichor, the “blood” of the Greek gods. Wikipedia has more to say on its origins (which are fascinating).
And it’s a fitting word to learn today of all days, following the first little bit of rain we’ve had after weeks of heat and dryness.