RIVERSIDE - The late-summer heat wave that began Tuesday will not relent until early next week, pushing the mercury above 100 degrees -- and into the 110s in some locations -- throughout the Inland Empire, the NationalvWeather Service said today.
The NWS revised its previous Excessive Heat Warning, extending it to 8vp.m. Tuesday, instead of Monday.
``Extreme heat will significantly increase the potential for heat-related illnesses, particularly for those working or participating in outdoor activities,'' the Weather Service said.
The California Independent System Operator, which manages the power grid, called for another Flex Alert on Thursday, asking residents to minimise power consumption whenever possible due to elevated demand as air-conditioning units run flat-out.