Hell (2011)

In 2016 the sun has turned the entire world into a scorched and barren wasteland. The humans who have survived are either resourceful or violent, and sometimes both. Marie, her little sister Leonie, and best friend Phillip, are in a car headed to the mountains - rumor has it there is water there. Along the way they meet Tom, a first-rate mechanic. But can they trust him? Fraught with deep distrust, the group is lured into an ambush where their real battle for survival begins.

Source: TMDb