Credit: ABC Photo: STILL: Meredith Goes Into Painful Labor, Derek Helps

Grey’s Anatomy heads into its Season 9 finale (Episode 24: “Perfect Storm) this Thursday, and there will be two superstorms at Grey Sloan Memorial: the hurricane-level rain and serious relationship drama.

In addition to Arizona cheating on Callie (and the awkward aftermath), we’re going to see Meredith go into labor — and it isn’t looking good for the expectant mom.

The sneak peek clip below opens with Meredith bent over with intense contractions as Derek rubs her back and helps her through it. The lights are already flickering and the obstetrician is busy, which has everyone on edge. Of course, Cristina picks that moment to barge in, trying to take over.

“Of course you go into labor during a superstorm,” she says after running into the room. “OK, we need to go over your birth plan. I never got the details...”

Meredith exclaims, “Hang on!” to which Cristina responds, “I can’t bully people if I don’t know what to bully them about!”

While both Derek and Cristina try to get her back in bed, she refuses. What does she need? “Ice chips!” Her husband instead opts to go find out what is taking the obstetrician so long.

“She’s with other laboring moms right now! She’s busy!” Meredith exclaims. “You’re the only one I care about — the rest can wait,” he says, leaving her with Cristina, who questions her pain level. Then two shockers come: Meredith’s pain level is at a “9,” and when she asks Cristina to distract her with Owen news, she claims he’s “at a 10.” Eek!

Check out the video above to see the trio in action, and then hit the comments with your thoughts and theories about the MerDer baby.

The Season 9 finale of Grey’s Anatomy airs Thursday, May 16, 2013 at 9 p.m. ET/PT on ABC.

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Alyse Whitney is an editor at Wetpaint Entertainment. Follow her on Twitter @AlyseWhitney.