A winter storm brought icy and potentially dangerous conditions to roads and airports across the region Sunday night.
Nearly 700 schools across North Texas either canceled or delayed the start of class on Monday morning.
The Arlington, Dallas, Denton, Fort Worth, Frisco, Garland Irving, Lewisville and Plano ISD's were among many districts that canceled Monday classes Sunday night. Southern Methodist University, Texas Christian University and the University of North Texas also canceled Monday classes.
Check the link below for instant updates on the latest school closings:
Weather AlertNorth Texas School Closings
Dallas-Fort Worth International Airport and Dallas Love Field are the number one and two airports in the world most impacted by weather on Monday, according to FlightAware statistics.
As of 9 a.m. Monday, airlines serving DFW canceled more than 1,100 scheduled flights. Travelers can check here to get the latest flight information from DFW.
Officials at Love Field reported at least 65 cancellations. Southwest Airlines canceled more than 100 flights, system wide.
DFW Airport began treating elevated surfaces and runways Saturday night, ahead of the storm. Officials said they are closely watching for potential roadway hazards, and aircraft deicing trucks are on standby.
American Airlines announced flexibility options available for ticketed customers impacted by this weather situation. For reservation information, check the AA Travel Alerts page, or call 1-800-433-7300.
Dallas' Love Field reported nearly 100 cancellations Monday after only four Sunday.
Dallas Area Rapid Transit suspended light rail service to DFW. Officials said DART service will resume when the weather improves.
The Texas Department of Transportation used brine — a mixture of salt and water — as well as sand and salt to pre-treat the roads. The Dallas district has 180 pieces of equipment and more than 300 crew members ready for the winter storm. Graders are also in place in ready to break up ice if it accumulates.
The city of Dallas said nearly 300 bridges in Dallas have been checked by deicing teams. The city deployed 35 trucks and 100 staff member working around the clock. The city's Emergency Operations Center became active at 4 p.m. Sunday.
Nearly 100 NTTA vehicles, including sand trucks, plows and brine units, were ready to be deployed and about 180 NTTA employees began 12-hour shifts at noon Sunday.
The NTTA strategically placed sensors at various locations along its tollways. The sensors will tell crews when the roads start to freeze and need more treatment. Pavement sensors reported roadway temperatures remained below freezing on Monday afternoon.
Drivers were reminded to keep a good distance from sand trucks.
As of 3 a.m., there were 22 reported power outages in Dallas County and 203 in Tarrant County.
Collin County reported fewer than 5 outages.
Weather AlertGuide to Getting Through Winter Weather in DFW
NBC 5's Jocelyn Lockwood, Todd L. Davis and Reginald Hardwick contributed to this story. NBC 5 will continue to monitor the situation, and our team coverage will provide immediate updates as they come in.