A warm month ended with the most extreme flash downpour seen for a year in Sheffield, according to new figures.
The temperature in April reached 21 degrees - the highest it has been for three years in the city - data from the Museums Sheffield Weston Park weather station shows.
The average monthly temperature was 10.6 degrees, compared to the average of 8.2.
But 9.4mm of rain fell in just one hour on the final day of the month, last Wednesday, during a sudden storm.
Alistair McLean, the museum service’s curator of natural science, said: “That much rain falling in one hour is quite a bit.
“We have recorded more but it’s the most we have seen for about a year.”
The downpours were so severe, and affected the south east of the city so badly with localised flooding, that they triggered a special section 19 report to investigate from Sheffield Council and Amey.
Mosborough and Normanton Springs were the worst affected areas and staff from contractor Amey worked ‘through the night’ to clear culverts and gullies blocked by flood debris.
At least eight properties had internal flooding.
Steve Robinson, head of highway maintenance at the council, said: “We are investigating causes of the flooding following the torrential downpour to see what measures can be taken to minimise the risk of future incidents. We are advanced in developing sustainable urban drainage systems to reduce the risk of future problems.”