A heat wave is expected to wash over the Inland area – and beyond – this week, bringing triple-digit temperatures and a warning from the state’s workplace safety organization.

While no records were broken Tuesday, Riverside reached 94 degrees and Ontario hit 92.

Temperatures are expected to climb each day and peak this weekend – highs of 100 to 107 are forecast for the Inland valleys on Saturday – before ticking back down. A high of 104 is expected Tuesday.

And it’s expected to be even hotter in the San Gorgonio Pass and the Coachella Valley, where a heat advisory has been issued until 7 p.m. Sunday.

Temperatures are expected to reach 108 to 118 degrees.

An excessive heat warning was also issued for a wide swath of desert, from the Salton Sea, into Imperial County and east into the Phoenix area.

The warning lasts until 8 p.m. Monday, and calls for afternoon highs ranging from 110 to 115 degrees – and very little relief overnight. Lows will dip only into the 80s, the National Weather Service says.

The Coachella Valley, where the heat advisory was issued, won’t fare much better. Forecast lows there will drop to 77 degrees.

Palm Springs on Monday was a precursor to how hot it can get: the city’s lowest temperature – 81 degrees – was the highest low temperature on record. The previous record was 80 degrees in 1961, data show.

The high temperatures have prompted a safety warning from Cal/OSHA, which protects workers from hazards on the job.

“During times of sustained high heat, it is especially important that employers take the necessary steps to prevent heat illness for their outdoor workers,” said Christine Baker, director of the Department of Industrial Relations. Cal/OSHA is a division within DIR.

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Cool centers will be open all over the Inland Valley.

Riverside County residents can find a cool center by visiting rivcohealthdata.org and clicking on Cool Centers in the center of the page.

San Bernardino County residents can visit 211sb.org and type in “Cooling centers” in the search box.

The Weather Service offers some tips on dealing with the heat.

Minimize strenuous activities during the heat of the day Wear light, loose clothing

Stay in an air conditioned environment as much as possible

Eat light, easily digested food and stay hydrated with cool non-caffeinated, non-alcoholic beverages

Take a cool bath or shower Never leave a child unattended in a vehicle and make sure they can’t reach the keys so they don’t accidentally lock themselves in

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