I'm going to say start with the basics, sounds like white smoke = steam. when the gauge hits the red it'll be that hot and under pressure that when it releases it'll instantly be vapour.
I hit the red once in an Express van, bang, radiator tank separated and all I saw in my mirrors was a white cloud. thought I'd hit something but it was the contents of the radiator vaporising.
So there's a lot of variables from split hoses, seized thermostat (closed), failed water pump, blocked radiator.
Avoid adding cold coolant to an overheated engine , let it cool down a bit and add with it running, you can crack heads.
be careful releasing the cap if it's this hot , Burns
don't have the A/c running, that will just add heat into the area