... then maybe a device like the one mentioned here with GPS etc would be useful for those known to be at risk? Not yet available in Europe but hopefully it will be and will come down in price.
Discussion and review here: http://www.computeractive.co.uk/ca/news/2235614/philips-lifeline-gosafe-for-the-elderly
Discussion and review here: http://www.computeractive.co.uk/ca/news/2235614/philips-lifeline-gosafe-for-the-elderly