Nope. You should have chosen Paris for that comment.
On all Airbus/Boeing types (and probably all other modern passenger aircraft) there's NO insulation or heating in any of the tanks (aside from minimal excess heat from fuel pumps), or on any of the pipes. The risk of hot things in contact with flammable vapour is somewhat frowned upon by the airworthiness authorities, especially after TWA800 came down (centre tank explosion). Failure mode testing of fuel pumps in particular is now *very* extensive.
Travelling at Mach 0.8 plus provides a moderate heating effect (meaning total air temperature - TAT - is several degrees higher than ambient). That said, aircraft still have to descend to warmer air on occasion, although this is quite rare and mostly on very long sectors.
Finally, draining water sumps is only done every few weeks (up to a month in some cases). The thermal mass of remaining fuel and of the airframe means that accumulated water usually remains frozen during a turnaround, and of course many parts of the world are below freezing for months at a time. Airlines in these regions have to put aircraft into a (warm) hanger for hours to drain water effectively. The operators find this to be a pain in the arse, as you might expect.