I usually let the grill cool off then close the tank valve before rolling it back into the garage but hadn't got to that yet. Sometimes I don't get around to it until the next day or 2.
It was an Amerex A400, might be a 10# FE?
Wife was right out there with a phone ready in hand when I went back out with the FE so she got a good look at it. We had some discussion afterward about our FE supply and placements. I really have to stop procrastinating and order Element FEs for each vehicle and get something mounted on the tractor.
The fire was originating at the top of the tank, reg or hose or coupling. After the fire was out I went back for the welding gloves so I could close the valve. I couldn't have touched any part of it without them.
I have ABCs, one old CO2, and 2 or 3 Halogens (1 or 1.5#). Element will be a new type for me.
https://elementfire.com/