If the sky was covered with thick black clouds, the color of the Prophet's (ﷺ) face would change; He would then enter the house, go out, go to the front and then come to the back. Then if it rained (started), his panic would go away. I could tell by the look on his face. Once (about the reason for this) I asked the Prophet (ﷺ). In reply he said, “Aisha! It could even be like the clouds that the people of Aad said when they saw it - (24) And when they saw it as a cloud approaching their valleys, they said, "This is a cloud bringing us rain!" Rather, it is that for which you were impatient: a wind, within it a painful punishment, (25) Destroying everything by command of its Lord. And they became so that nothing was seen [of them] except their dwellings. Thus do We recompense the criminal people. (Sura Al-Ahqaf 46:24-25)

Reference: Bukhari: 3206