Much of San Diego County is under a fire weather warning Monday with hot and windy conditions expected until 8 p.m.
A heat advisory was in effect for the coastline until 8 p.m. Temperatures in the 90s are expected at the beaches.
Inland valley neighborhoods are going to see triple-digit heat.
"It's going to be one of those days where you need to take extra precautions," said NBC 7 Meteorologist Jodi Kodesh.
For a list of cool zones in San Diego County, click here.
The mountain communities will see temperatures in the 70s and 80s. However, northeast winds of 15 to 30 mph with gusts as high as 50 mph are possible for Palomar Mountain and parts of the Cleveland National Forest.
At the Alpine Vista point on Interstate 8, there was a warm breeze blowing just before noon.
Two women from Denmark were cycling along I-8 on their trip from San Diego to Florida.
Riding up and over these mountains are difficult enough but now they said the conditions don't help.
"It's harder than we thought it would be because of the heat," said Lene Voermanns. "We're not used to the heat and the wind was against us instead of at our backs."
The National Weather Service is expecting humidity between 8 and 15 percent and so firefighters around the county are on alert.
Cal Fire is advising residents to skip yard work because even a small spark from equipment can start a brush fire.
The agency is at full staffing for these Santa Ana Winds.
The threat of a wildfire is considered marginal for San Diego County according to the Santa Ana Wildfire Threat Index. The designation means that up ignition, fires may grow rapidly.
The U.S. Forest Service has instituted on 24-hour, even though the red flag warning is supposed to expire Monday afternoon.
Residents of San Diego County are advised to make sure that an emergency preparedness kit is prepared and stay aware of the latest news and information on the fire from local media, according to the San Diego County Office of Emergency Services.