Area Gragh gives us an insight into all gas leak calls made for the month of December 2016 [Data Source: SF OpenData]
Something interesting we understand from this visualization is that something occured after Christmas concerning gas leaks. All the other days in the month never exceed past 12 calls, but on the 28th we see a peek in calls that reaches 21. This is strange considering all the other days are lower. Additionally, on actual Christmas day - the 25th, there are no calls regarding gas leaks.