Forecasts show clear and sunny weather for Loma Linda and Redlands all week, with highs in the 90s beginning Wednesday.
Overnight lows are expected in the high 50s to low 60s, according to the National Weather Service.
Highs of 89 are expected Monday and Tuesday, and highs in the low 90s are expected Wednesday, Thursday and Friday.
Mountain temperatures are expected to be 10 to 15 degrees cooler, with highs in the 70s Monday, Tuesday and Wednesday, and highs near 80 Thursday and Friday on man-made Big Bear Lake, according to the Weather Service.