The Second Arrival (1998) on Netflix

Plot summary

Zane Ziminski's broadcast about aliens was written off as a hoax after NASA dismissed him, even though record temperatures continue around the world. Then word arrives that he has died of a heart attack in a remote Inuit community. As television reports the death, envelopes reach five people. Three of them are scientists; another is Jack Addison, Zane's half-brother, a computer expert who has not seen him in seven years; the fifth is Bridget Riordan, a reporter. Inside are papers linking global warming to an invasion and describing a plan to reshape Earth into the hot world the aliens need. The five agree to meet in a large freezer, a place the aliens cannot tolerate, to learn what Zane left them.