A way to fight fires

THERE have been many fires in formal and informal communities, and I am proposing a sprinkler system that could make use of water in plastic containers or tanks of water above thatched roofs and so on.

The basic idea is from an old chemistry book which says that bismuth is used in making alloys that melt at temperatures below the boiling point of water.

Bismuth alloys are used as plugs in automatic sprinkler systems as they melt when there is hot air and so on from fires, and so release the water.

Innovative shack dwellers (perhaps with help from government) and richer people could set up their own systems using these ideas.