Santa Clarita was devastated by the 1994 Northridge earthquake. The Newhall Pass interchange of I-5 and CA-14 collapsed, and Sierra Highway became the only route in and out of the valley; Sierra Highway was soon closed as well. Several surface streets throughout the city were closed due to structural damage. The Four Corners oil spill led to contamination of the Santa Clara River. Electricity was temporarily shut off for the entire valley, and schools were closed. Shelters opened in Newhall, Saugus, and Canyon Country. The National Guard was sent to the area, and City Hall was temporarily relocated. Water distribution points were set up as residents lost access to running water.