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Fire detector for tightly-packed slums alerts at-risk neighbors

In an average-sized home, a smoke detector is useful for sensing the presence of a fire while distinguishing dangerous heat from cooking. However, in the shacks found in the slums of South Africa, for example, ovens aren't used and standard devices aren't as suitable for determining real threat. The country's Khusela startup has now developed a smart detector specifically for shacks, which enable community-wide warnings in the event of a fire.