San Diego County Faces Record-Breaking Heat Advisory This Week

San Diego, California – Sweltering heat this week could bring record-breaking temperatures to parts of San Diego County, prompting weather advisories and the closure of some recreational areas.

NBC 7 meteorologists reported that temperatures through Wednesday are expected to reach the 90s in inland valleys and mountains. Some areas may even approach triple-digit temperatures.

The National Weather Service has issued a heat advisory until 8 p.m. Wednesday for the inland valleys and mountains, including the cities of El Cajon, San Marcos, Poway, Escondido, Santee, Pine Valley, and Julian. A heat advisory is announced when temperatures can cause heat-related illnesses.

Residents are urged to stay indoors or seek shade where possible and to stay hydrated by drinking plenty of fluids.

Additionally, the Three Sisters Falls and Cedar Creek Falls hiking areas are closed to hikers through Wednesday due to the excessive heat.

The summer-like temperatures are about 10 to 15 degrees above average for this time of year, coinciding with the upcoming solstice on Friday. However, residents can expect a cool-down beginning Thursday, which should lower temperatures through the weekend.

By Sunday, the same areas currently under a heat advisory may experience temperatures 10 to 15 degrees below average for this time of year.