Qatari authorities should adopt and enforce adequate restrictions on outdoor work to protect the lives of migrant construction workers who are at risk from working in the country’s intense heat and humidity...Current heat protection regulations for the great majority of workers in Qatar only prohibit outdoor work from 11:30 a.m. to 3 p.m. during the period June 15 to August 31. But climate data shows that weather conditions in Qatar outside those hours and dates frequently reach levels that can result in potentially fatal heat-related illnesses in the absence of appropriate rest...The lack of transparency on migrant worker deaths has made it difficult to assess the extent to which extreme weather conditions are harming those working outdoors...Authorities also should investigate the causes of migrant worker deaths, regularly make public data on such deaths, and use the information to devise appropriate public health policies.