While urban railway bridges, parks and pavements may not be the first image you see, many cities have been quick to embrace the foraging trend.

BBC: The art of urban foraging

The heat has damaged wiring to urban railway lines, bringing delays to much of the network - CityRail have warned passengers to carry water with them.

BBC: Sydney bakes on hottest day on record as bushfires rage

Granted, it is reasonable enough that most urban transport systems are subsidised, with subsidies ranging from nothing on Hong Kong's Mass Transit Railway to around two-fifths of revenues in Madrid.

ECONOMIST: The end of the tunnel