Instead of what it is, imagine this first picture to be a stream of water from an installation sitting on the top of a tower block:

How are fires fought in high-rise blocks? - BBC News

Is there a way to curl the beam much more so that it curves inwards and attacks a fire half way up the block?

I am thinking of charged plates in the nozzle charging the droplets up, and these droplets passing through the earth's magnetic field (or another created for the purpose) and being bent using the left hand rule or maybe the right hand rule (can't remember which).

Is there a fire fighting technique here?

__________________
 

I've seen various patents and methods of either negatively or positively charging water, then spraying the mist not on the fire but next to it and the fine droplets and the fire are attracted to each other and the fire gets put out - with very little water.

__________________

you don't need a magnetic field to bend the path of the water, just an electric one.
an electric field will bend any liquid with polar ionic bonds (like water)
easiest way to see this is an electrostatic charged item and a water faucet set on low.

__________________