Maybe i missed your point if you meant that aerosolization will occur readily simply when opening a faucet … ?

Otherwise - - documentation :
https://en.m.wikipedia.org/wiki/Legionella

Temperature affects the survival of Legionella as follows : [3]

• Above 70 °C (158 °F) – Legionella dies almost instantly
• At 60 °C (140 °F) – 90% die in 2 minutes (Decimal reduction time (D) = 2 minutes)

i would not expect much aerosolization if heated slowly … and you did not provide any documentation.

i don’t believe your statement but I would if you gave some references. Can you link some documents that explain why boiling doesn’t kill those bacteria ? … or should not be used to sterilize such water ? …any document about survival or whatever I don’t know.

in the context : this guy wants to go to a date and he needs water now. So, for a few hours the water the in the tank is safe // if this guy has some brain - - and he looks like a very smart guy - - he will know how to handle this water. Otherwise, for stupid people : yes, your advice is good.

For myself, i know how to sterilize water - - i don’t know about you … if you are in an emergency … in an earthquake situation … in a desperate situation … you may choose to do something special in such situations … if you think you have some survival skills.

Just boil the water before using it. Consider it under boiling advisory.

Just boil the water before using it. Consider it under boiling advisory.

(( Edit :
Boil the water before using it. Consider it under boiling advisory.
… - - see comments below ))

cut the electric breaker to your hot water tank so you don’t burst and an eating heating element if there is lower water level inside the tank.

Now you can use this tank as a water supply. You take water from the bottom tap of the water tank. Let the air come inside the tank by opening another top level hot water faucet anywhere inside the home. Be careful to (carefully) refill the water tank once municipal supply goes back on.