SAN ANTONIO (AP) — The blast of freezing rain and snow that disrupted schools and businesses across much of Texas for two days was expected to begin moving out, giving roads and residents a chance to thaw. Students who enjoyed extended weekends after Martin Luther King Jr. Day headed back to class Thursday in San Antonio, Houston and Austin as transportation officials reopened some roadways that were closed because of icy conditions. The reprieve may be short-lived for parts of northern and western Texas, where weather officials predicted cold and possible snow for Friday and the weekend. The storm that paralyzed the eastern half of the country had much of Texas hunkered down against a rare onslaught of snow and ice. At least 65 storm-related deaths have been reported in nine states, including 10 in Texas. The Alamo was closed Tuesday and Wednesday morning, as were schools and offices in San Antonio, Houston and Austin after most of the state got more winter weather than it was prepared for. Accumulations were light by some other regions' standards — the Dallas area topped out at 3 inches of snow — but hundreds of airline flights were canceled and tens of thousands of electricity customers lost power. The Texas Department of Transportation urged motorists to stay off the roads early Thursday morning and warned that black ice remained a risk, especially in the southern two-thirds of the state. A 300-mile stretch of Interstate 10 from Fort Stockton to San Antonio remained closed early Thursday after being shut down Tuesday.