What has caused the flooding in Madrid and across areas of Spain?

It's called a cut-off low in English.

For those interested, here's an article (free) from a reputable source about it:

https://www.consorsegurosdigital.com/en/numero-12/front-page/cut-off-lows-their-characteristics-and-their-effects

#DANA #SpanishFlooding #CutOffLow