Writing Prompt #227 - Genre: Science Fiction dealing with both Colonization & Dying Earth

For an unexplained reason, Earth's orbit has changed and is now closer to the sun. Since the planet has become too hot to sustain life, a mass exodus of humans to another habitable planet has begun. You and your team of engineers must develop a fleet of spaceships before the Earth becomes a barren wasteland.

The Imagination is up to you!