 In Mier , the spillway of the Las Blancas Dam was overtopped , causing a river bridge to be destroyed and electric power to be lost , as well . In Río Bravo , 50 families were evacuated as seven collective farms became hard to reach by road ; approximately 90 % of the residences in the farms were affected by the storm . In Altamira , 200 families were evacuated as well , and relocated to seven shelters . Also , in the municipalities of Burgos , <unk> , and Méndez there was flooding in collective farms and family dwellings . Overall , the municipalities of Mier , Reynosa , Río Bravo , Valle Hermoso , Matamoros , San Fernando , San Carlos , Burgos , <unk> , Méndez , Soto la Marina , Mante and Altamira were affected in the state , losing potable water and electricity . 
