Given the task definition and input, reply with output. In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

Southwest Airlines said Monday it would be able to operate “close to normal” at Midway Airport after canceling all flights Sunday, a situation it blamed on an equipment malfunction and a shortage of de-icing fluid. 
  
 The airline left hundreds of passengers stranded Sunday after having trouble de-icing planes at Midway. More than 250 flights were canceled. 
  
 In an emailed statement Monday morning, the Dallas-based airline said it expects to operate “a close to normal” schedule. 
  
 “The glycol (used to de-ice aircraft) has been replenished and the airport deicing equipment is fully functional,” the company said. Predicted clear skies would also help the airline operate more than 250 flights out of Midway, it said. It also apologized to passengers for the inconvenience. 
  
 Southwest spokeswoman Lisa Tiller said a pump on one of the glycol tanks was not working property Sunday and the airline could not access some of the fluid. The pump has been fixed and additional glycol has been delivered, she said in an email. 
  
 She declined to be specific about what measures were being taken to accommodate passengers. Tiller said the airline doesn’t typically offer “gestures of goodwill” as a result of weather events, but the large number of cancelations in this case has the airline making “additional considerations for impacted customers.” 
  
 This is the second time this winter that Southwest has run into de-icing problems. 
  
 A few days after Christmas, 90 Southwest Airlines flights were canceled due to delays caused by the de-icing of planes, according to a statement from the airline at the time. The airline blamed freezing conditions at the airport for slowing down crews in charge of de-icing the planes. 
  
 crshropshire@chicagotribune.com 
  
 kdouglas@chicagotribune.com 
  
 Twitter @corilyns 
  
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 A departure board shows cancellation flights of Southwest Airlines at Chicago Midway International Airport in Chicago after a winter storm moving across the Great Lakes forced the cancellation of hundreds of flights on Feb. 11, 2018. (Photo: Brian Cassella, Chicago Tribune, via AP) 
  
 An icy winter storm moving across the Great Lakes forced Southwest Airlines to cancel all of its flights in and out of Chicago on Sunday. Southwest said the cancellations were due to a shortage of airplane de-icing fluid. 
  
 In all, more than 250 flights were canceled “due to winter operational issues,” Midway Airport tweeted Sunday night. 
  
 Southwest said it “proactively canceled” about 220 flights and was offering refunds or flight vouchers, WBBM-TV reported. 
  
 Airlines at MDW have canceled 250+ flights today due to winter operational issues. Confirm flight status w/ your airline. — Midway Intl. Airport (@fly2midway) February 11, 2018 
  
 Due to having to deice many of our aircraft because of the weather, we are running low on deicing fluid. Safety will remain our top priority in this circumstance. Please reach out to our Team or Reservations Agents to get rebooked just as soon as possible. ^AB — Southwest Airlines (@SouthwestAir) February 11, 2018 
  
 In a statement, Alyssa Eliasen, a spokesperson for the airline, said Southwest had "actively worked to manage our glycol levels (used to deice aircraft)," but that due to the severity of the winter weather it was forced to cancel the flights. 
  
 Southwest has "multiple glycol deliveries" scheduled for Monday and expects to resume "close to normal operations" at Midway, she said. 
  
 Follow Greg Toppo on Twitter: @gtoppo 
  
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Thousands of travelers booked on Southwest Airlines flights out of Chicago's Midway Airport had to change their plans after the airline found out that it didn't have enough de-icing fluid—for the second time this winter. An airline spokesperson said Southwest had "actively worked to manage" its level of glycol, which is used to de-ice aircraft, but "proactively" canceled at least 220 flights Sunday after levels ran low, USA Today reports. Midway Airport said a total of 250 flights were canceled after an icy storm, suggesting other airlines were also affected, though operations are expected to return to normal Monday, the Chicago Tribune reports. Forbes notes that the same thing happened in December, when Southwest canceled at least 90 flights from Midway due to de-icing issues.