PBS will air its long awaited climate documentary “Heat” tonight, as part of its Frontline series. The two-hour program rolls at 9 p.m. on KQED and most other PBS stations.

My companion program, “California Heat” also premieres tonight as part of the Viewfinder documentary series on KVIE Public Television in Sacramento. This show airs at 7 p.m., and sets the stage for Frontline by examining the almost certain effects on California–and interior California in particular.

Frontline takes it from there, examining our readiness as a nation and as a global community, to take on the challenge.