Avon and Somerset Police say 85 crimes were reported within the first 48 hours of the Glastonbury festival opening its gates on Wednesday morning. That's a 30% decrease on last year.
About half of these were property thefts, with 30 people arrested so far.
Police said they used tracking software to locate one stolen phone and arrested a woman overnight.
Inspector Liz Hughes, of Avon and Somerset Police, said: "Thanks to a tracking app, we've been able to recover a stolen phone, which shows that they really do work."
"They are really useful and I would urge anyone who hasn't already got one installed to do so today."
"We've also arrested three men on suspicion of theft and this shows that there are a very small number of people who come here intending to steal and spoil the fun for everyone else."
"While the arrests are a positive step, it's a reminder to us all to look after your possessions very carefully."
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Fire and Rescue Service says it received a 999 call to say there had been an explosion in a third floor flat within a mid terraced building.
It will be a dry night for most areas and stay mild for all. There will be clouds and some areas may experience mist or fog.
This evening will be dry and mild for all.