Strong winds, heavy rain and lightning rolled through downtown Chicago shortly after the noon kickoff of the Bears-Ravens game, and fans were warned via public address an evacuation may be necessary, WBBM-TV, Chicago, reported.
The call for fans to leave the stands came at 12:54 p.m. CST, triggering an exodus that was hampered by clogged aisles in the stadium's upper deck, the broadcaster reported.
The deck was finally cleared about 30 minutes later as the Ravens held a 10-0 lead with about 10 minutes left in the first quarter.
The game was resumed after a 1-hour, 53-minute delay.
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