Find a location that should still be able to sustain life in a few decades, learn self sufficiency and crop growing in harsh climates, emigrate (if necessary) as soon as possible before further refugee crises make this impossible, transition your career to one working to stop this or ameliorate its effects (climate.careers, etc.), decide whether or not to have a kid.
Edit: Also, consider running for office, if your government hasn't suffered complete regulatory capture, and if you have money to invest maybe look at things like Engine No. 1's ETF (VOTE)
Edit: Also, consider running for office, if your government hasn't suffered complete regulatory capture, and if you have money to invest maybe look at things like Engine No. 1's ETF (VOTE)