The Labour Department recently upgraded its Heat Stress at Work Warning system, making it easier for higher-tier alerts to be sent out, so that employers and workers, especially those who have to work outdoors, can react quickly during very hot weather.Unfortunately, the most we seem to be able to do is issue warnings and recommend passive mitigation measures such as relaxing the work schedule, resting in the shade and staying hydrated. We are sitting ducks as temperatures peak year after...