More than a thousand Brazilian municipalities were on alert Thursday due to very low humidity—in some cases comparable to that of the Sahara desert—as the country is gripped by a historic drought that has fueled major wildfires. More than a thousand Brazilian municipalities were on alert Thursday due to very low humidity—in some cases comparable to that of the Sahara desert—as the country is gripped by a historic drought that has fueled major wildfires. Environment Phys.org – latest science and technology news stories