More than a third of the average Welsh rainfall for the entire month of June poured down on parts of North Wales over a 24-hour period.
A staggering 34.2mm of rain drenched Hawarden, with 31.2mm soaking Rhyl, according to data from the Met Office on Wednesday evening.
The average rainfall for Wales is 85.8mm over the whole of June, according to the forecaster.
That works out at about two fifths of the entire rain for the month falling in 24 hours, which has led to roads and schools being closed, rivers bursting their banks, and transport being disrupted.
Flintshire appeared to be the worst hit with multiple road closures and disruption to school transport, recycling centres and waste collections.
Houses were evacuated on Bagillt Road in Greenfield , and there was flooding in Mancot and Loggerheads Country Park near Mold .
At its height, there were seven flood alerts and one flood warning in place in the north east.
Large parts of North Wales are set to remain on weather alert, with a yellow weather warning for rain covering the north east and parts of the north west until midday on Thursday.
The Met Office warned heavy rain may lead to travel disruption and flooding, with delays and possible cancellations to services.
They said: "Early rain, heavy at times, will continue to move southeastwards across all parts during the morning. The rain turning more showery as its moves southeast during the afternoon. Feeling cool. Maximum temperature 16 °C."
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