hundraårsregn

== Swedish == === Etymology === Compound of hundra (“hundred”) +‎ år (“year”) +‎ -s- +‎ regn (“rain”). === Noun === hundraårsregn c A hundred-year rain; a very large amount of rainfall that statistically has a 1% chance of occurring in any given year (i.e. once every hundred years on average). Near-synonym: hundraårsflöde ==== Usage notes ==== While the terms hundraårsregn and hundraårsflöde can sometimes be used interchangeably – since one is the cause of the other – hundraårsregn refers to the downpour itself, while hundraårsflöde refers to the resulting water levels in rivers and stormwater systems. === See also === tioårsregn (“ten-year rain”) tusenårsregn (“thousand-year rain”)