missing. According to the Comisión Federal de Electricidad, 4,000 customers lost electric power in the Monterrey metropolitan area, as did 61,000 people statewide. 18 wells lost power, leaving 110,000 without water service in the municipalities of Santa Catarina and García. Heavy flooding occurred along the Santa Catarina River in Monterrey, normally a dry river bed that flows into the Rio Grande, causing it to reach a record flow of . The flooded stream washed away multiple parked vehicles, a popular flea market, and sport facilities built within a riverside greenway. The Santa Catarina River also destroyed about of Monterrey's main arterial streets. Multiple washouts caused the closure of the divided highway between Monterrey and Saltillo, Coahuila. In San Nicolás de los Garza, the Arroyo Topo Chico exceeded its banks, forcing multiple street closures. An explosion and fire occurred on a bridge in the Guadalupe municipality when a transformer fell on an old gas pipe. No injuries were reported due to the fire. In Linares, the rainfall from Alex's remnants caused a wing of the municipal townhouse, which was built in 1896, to collapse. The building was listed as a protected historic building. A bridge on the Pilón River collapsed in Montemorelos, rupturing a 24-inch oil pipeline in the process. However, the valves on both ends of the pipeline section were closed, minimizing the leak over the river, and the leak was not expected to adversely impact drinking water supplies in El Cuchillo Dam. Hurricane Alex affected the infrastructure of 1,077 schools in the state, 60 of which were severely damaged and 552 held intermediate damage. Nationwide disruption in Internet connection and cell phone services was caused by damage to optical fibers, backbone nodes and telephonic central stations in Monterrey. Additionally, Telefónica reported damage to its network in Monterrey and Saltillo, causing intermittent unavailability of telecommunication services. Preliminary estimates of the damage in the state rose to $10 billion (2010 MXN; US$762 million); final damage estimates released on August 5 totaled $16.9 billion (2010 MXN; US$1.35 billion) statewide. Coahuila In Coahuila, rainfall from Alex's remnants caused a small dam in an ejido in Castaños to overtop, forcing the evacuation of 50 people in the municipality's seat. The ensuing flood rose and damaged 15 homes. The coal-producing region of the state was left isolated after the Álamos River broke its banks. Hundreds of residents in Nueva Rosita and Sabinas were evacuated; in