I always hope that when it comes to disaster or considering the scale here doomsday movies and TV shows there will be a lot of emphasis on what causes it and the clever ways people find out to solve it (like in Andromeda Strain) but eventually it usually turns out to have 2 percent about the science and miystery and 98 percent of people, usually family members of the main characters running around in a collapsing world trying to survive and reunite. It was funny the first time but this is the 50th such story and I'm bored. Running, screaming, some shooting also people keeping secrets, lying and being stupid. That's what this show mostly is.
And as always at least one scene where some violent thug comes after a main character, luckily gets hit on the head and collapses but instead of making sure he never gets up again and causes anyone harm our heroes choose to run away so he can later get up and pursue them. Terribly annoying.
So don't expect anything outstanding, this stuff can be watched once and kind of enjoyed but then it will be quickly forgotten.