Examples of the "one month in a day" reporting can be seen after the record daily rainfall July 8, 2013 in Mississauga.
TheStar.Com reported after the incident that stranded customers were offered $100 as compensation and the GO Transit vice-president for customer service said "It is an exceptional gesture for an unprecedented circumstance." She added “That was a night of firsts for us: The first time we had a month of rain in one night ...".
Back to GO Transit and Metrolinx's assertion that a month of rain in one night is unprecedented. To assess this we can refer to Environment Canada's published "climate normals" including average monthly rainfall amounts. As expected those are low in the summer. For example, in Toronto where the GO Train was stranded the average rainfall for July is 63.9 mm, as shown below or at this link:
|Table 2a Return Period Rainfall Amounts (mm) in file: idf_v2-3_2014_12_21_615_ON_6158355_TORONTO_CITY.txt|
Version 2.3 data set for Ontario file: IDF_v2.30_2014_12_21_ON.zip