I read an article last week that said that the AMOC - an Atlantic Ocean current is showing signs of collapse.  This could happen, according to the article, as soon as 2025...so we need to hurry to get this film made.

AMOC is a disaster film without any CGI explosions or earthquakes or anything like that.  

This should be a psychological thriller.

We are always looking for the huge Tornado, the Earthquake, the Tsunami - but what if Water Currents were what really takes us down?

If this current collapses, within weeks, temperatures in Europe would drop 30 degrees on average. Sea levels would rise substantially, and the flora and fauna will not have the ability to react quickly enough to survive the way they are.

*****UPDATE*****
This was the premise for the 2004 movie Day After Tomorrow, so I'm 20 years late to this one.

Although, my interpretation would be different.