There has been an increase in the number of heavy precipitation events over many areas during the past century, as well as an increase since the 1970s in the prevalence of droughts—especially in the tropics and subtropics.
Terjadi peningkatan jumlah peristiwa hujan deras di berbagai daerah dalam satu abad terakhir, termasuk peningkatan sejak 1970-an akibat banyaknya kekeringan—khususnya di wilayah tropis dan subtropis.