220V in US is possible
Most houses in the US are connected to two 110V supplies that are 180° out of phase. If you know a competent electrician you can wire across the two phases and get 220V.
I live in the U.S. and my tumble dryer and electric cooker use this two phase 220v supply as standard, as does my hot tub. They're on dedicated circuits though as they each can draw up to 50A.
With an isolating transformer of capable rating, you can create a properly grounded 220V supply to an outlet in the kitchen, and then run a 3kW or similar european kettle. You would just have to have a very knowledgeable electrical inspector to sign off on that wiring.