Police have blamed the summer heatwave for a rise in drink-driving. Figures released on Thursday by Greater Manchester Police (GMP) show more motorists were arrested for the offence in August than last Christmas.
During a force-wide clampdown, 13% of drivers breathalised were over the limit compared with just 8.5% over the festive season.
And police say this summer's record temperatures are the reason for the increase - because people drank more alcohol to keep cool.
Inspector Brian Wood, Force Road Safety Officer, said: "The lead-up to Christmas is traditionally a time when we focus on drink driving but the effect of alcohol on drivers is every bit as dangerous in the summer.
"GMP continually advises drivers not to drink and drive and the figures from this campaign confirm the need for continued police campaigns."