Heatstroke is a Sci Fi Channel original movie. The film stars D. B. Sweeney and Danica McKellar. It was made by the team that made Farscape. The film was written by Richard Manning and David Kemper, produced by David Kemper, and directed by Andrew Prowse.
Dr. Taggert leaves the house to find and communicate with the aliens, and is killed by one. Mental goes out into the forest and is attacked by an alien, using up the last of his ammunition to kill it. OBannon and Caroline go to the forest to prepare a radio beacon for the military to use to launch a cruise missile. Immediately after arming the beacon, Waters attacks the two. After another fight, Waters is knocked out, and a worm like alien crawls out of his mouth. OBannon shoots the worm, and leaves the range of the missile. It hits, and destroys the alien facility causing global warming. In a moment of celebration, Caroline kisses OBannon.The group buries Waters and holds a funeral. Jillian asks if Waters was serious about raising a family. OBannon tells Jillian that Waters loved her. The movie ends with OBannon and Caroline holding hands looking at the coast of the island, and talking about the future plans. OBannon says he wants to go somewhere cold, and Caroline says she loves cold. ........
Source: Wikipedia