The mercury pushed into the record books in at least one Inland Empire location Monday, and another came close.
According to the National Weather Service, the high temperature in Idyllwild was recorded as 79 degrees, shattering a previous record of 77 degrees set on this date in 2014.
In Riverside, the sizzle almost punched through a record of 96 degrees set in 1904, but in the end, the mercury settled at the same level, leading to a tie in the 125-year history of record-keeping in the region by meteorologists.
A high-pressure system is causing the heat and is expected to be accompanied by gusty winds and clear, sunny skies Tuesday and Wednesday, forecasters said.
Although temperatures along the coast are expected to drop significantly on Tuesday as cool air moves in from over the ocean, that cooling is not expected to reach Riverside County until later in the week, the NWS said.
Fair weather with mostly sunny skies and temperatures in the mid 80s are expected for Friday, the first day of the 2018 Coachella Valley Music & Arts Festival in Indio. High temperatures in the Coachella Valley for the festival will be 83 on Friday, 88 on Saturday and 89 to 94 on Sunday.