59 Minutes by Holly Seddon

It's pandemonium in London and its environs when an alert says a nuclear missile will hit the area in 59 minutes. Carrie is on her way home from work and is desperate to be with her partner Emma and young daughter Clementine. Meanwhile, Frankie, newly pregnant, is on holiday with her boyfriend Otis. Mrs. Dabb, on the other hand, is frantically trying to find her teenage daughter Bunny, who did not take the school bus home and is missing. The reader follows these three women as they deal with their current situations the best way they can. Readalikes include 24 Hours by Greg Iles, Siege by Simon Kernick, and No Exit by Taylor Adams.