California heatwave enters intense phase bringing blackouts and wildfires

Four fire-related deaths were reported over the weekend as more than 4,000 firefighters battled 14 large blazes across the state

California's power grid is facing a major stress test on Tuesday, as a historic heatwave enters its most brutal phase. With temperatures in parts of the state forecasted to hit 115F (46C), officials are asking residents to prepare for possible rolling blackouts as the heatwave reaches a boiling point.

Officials said controlled power interruptions can help maintain reliability and avoid cascading blackouts", as people across the state crank up their air conditioners amid scorching temperatures, California's grid operator warned.