rapidly, quickly
Die Zahl der Wildschweine nimmt in Deutschland rapide zu.
The number of wild boars is increasing rapidly in Germany.
This city is growing rapidly.
Die Temperaturen in der Arktis steigen rapide.
Temperatures in the Arctic are rising rapidly.
Seit Sonnenuntergang sank die Temperatur rapide.
The temperature had been dropping rapidly since sunset.
— Weathering with You - Das Mädchen, das die Sonne berührte (2019)