After reports that burglars have been targeting homes with open upstairs windows and flat roofs in Hertsmere during the hot weather.
Police are warning there could be more victims this summer unless residents help beat the burglar.
The warning comes after a number of incidents including one in Mead Way, Bushey where intruders climbed on to the garage roof and removed beading from a glass door to gain access.
It is not known what was stolen during the burglary which took place between 2.30pm on June 28 and 7.30am on June 29.
Hertsmere Detective Inspector Graeme Walsingham said: “Whilst residents are being more careful to properly secure downstairs windows and doors, we are finding some burglars are going through first floor windows that have been left insecure. Burglars also use flat roofs to gain access to upstairs windows and can be quite nimble, getting to windows that people may think are inaccessible. We anticipate burglaries increasing during the summer holidays, as historically this tends to happen across the county.
“However, whilst we increase police patrols – both hi-visibility and covert, we can beat the burglar by closing all windows and doors, setting alarms on both floors of homes, investing in web cam CCTV security and by being a good neighbour. Please call us if you know your neighbour is on holiday and you see anyone acting suspiciously in your street. We would rather be called with good intention than miss the opportunity to catch a burglar.
“The burglaries are happening during the day and evenings. Also make sure you remove wheelies bins from beside your home so they are not used to gain access to the second floor.”
Between June 25 and July 8, there were eight burglaries in Hertsmere – five in Borehamwood, one in Bushey and two in Potters Bar.