Triple-digit heat will continue throughout the week in Riverside County, with an excessive heat warning in effect Monday until at least 9 p.m. Thursday in the Coachella Valley, Banning and Desert Hot Springs areas.
An excessive heat warning was also in place through 9 p.m. Sunday in Riverside County valleys, which include the cities of Corona, Riverside and Moreno Valley.
Temperatures in the deserts, mountains and eastern valleys ran slightly cooler Sunday due to low-level moisture and dew points in the 60s, according to the National Weather Service.
According to the NWS, Tuesday and Wednesday will be the hottest days of the week, and temperatures are expected to exceed 100 degrees Tuesday through Friday in the city of Riverside.
Meanwhile, in the desert, Palm Springs was expected to reach 120 on Monday and 121 on Tuesday, with similar highs forecast for Coachella and Indio.
With heat-related illnesses on the rise, forecasters advise people to drink plenty of fluids, stay in air-conditioned room, to not leave young children or pets in unattended vehicles, and to check-up on those susceptible to the heat.
Air quality regulators issued a windblown dust advisory until 8 a.m. Tuesday in the Coachella Valley and eastern Riverside County, where high winds may result in unhealthy conditions for sensitive groups.