Because climate change is affecting sea level rise and by 2050 coastal cities will be under water. Especially in the states of Florida, New Jersey and New York. I expect California is also at risk. They will be under water.
What will happen to the Florida Keys and outer Islands in the south and the Hawaiian Islands probably won't be so good either. You are being given notice. Plenty of notice. Will you ignore it as being hyperfake and just wait until your palatial beach home is gone? Up to you. Warnings cannot be forced upon you. At some point common sense and logic is required and no one can GIVE them to you. It's all up to you. Sink or swim or drown. Your choice.