Mandatory evacuations across the Texas Hill Country are under way as life-threatening flash floods wreck bridges and roads with more heavy rain expected overnight.A wide swathe of Texas is forecast to receive as much as 20cm (eight inches) of additional precipitation through Friday morning to cap off a week of downpours that revived memories of the catastrophic deluge that killed more than 130 people a year ago.Evacuations have been complicated by almost 90 road and highway closures between...