<Li> The Wells Fargo Terrace Club occupies another entire level of the ballpark . Open only to holders of Terrace Club seats and certain other ticket levels, the club features two lounges and wait service to each seat . As with suite level tickets, holders of Terrace Club seats are also entitled to a private entry to the ballpark . Terrace Club seats are also available on full - season, partial season, or individual game basis . </Li> <Li> The Hit it Here Café is located in right field, on the same level as the Terrace Club . Open to all visitors before game time on a first - come, first - served basis (though season ticket holders may make reservations), the café is only open to holders of tickets in the café during games . Hit it Here Café tickets are only sold on an individual game basis . </Li> <P> Safeco Field has a unique retractable roof that only acts as an "umbrella" for the stands and field rather than forming a complete climate - controlled enclosure, as is the case with all other retractable roofs in Major League Baseball . Seattle's relatively mild climate means the park rarely needs to be heated or cooled, but frequent precipitation necessitated a roof . The roof is sometimes closed, however, in dry weather when the temperature is particularly low . On cold nights, closing the roof helps prevent radiation heat loss . The only other covered baseball stadium in the world with permanent openings is the fixed - roof Seibu Dome in Tokorozawa, Saitama, Japan, home of the Saitama Seibu Lions . </P> <P> In the open position, the roof rests over the BNSF Railway tracks that bound the stadium to the east, with part of it hanging over the stands in right field . This has the effect of echoing the whistles from passing trains into the stadium . Train whistles were a frequent fixture of the Safeco Field experience initially, but abated significantly when an overpass was built for Royal Brougham Way, the street that bounds the stadium to the north which previously crossed the tracks . </P>

When do they close the roof at safeco field
find me the text answering this question