With a worsening drought gripping the West and wildfire season looming, California is bracing for the most severe heat wave of the year — one that promises to tax the state’s power supplies while also offering a grim preview of challenging months to come.

The heat wave will bring triple-digit temperatures to the valleys and inland regions of Southern California as well as many parts of the rest of the state, heightening fire risks. It comes as parts of Northern and Central California are turning to water restrictions as the drought rapidly alters the landscape.