Skip to main content
Day.News — Local News. Real Community.
CHULA VISTA DAY NEWS
Local News. Real Community.
weather
1 min read

Extreme Heat Warning: San Diego Inland Valleys Brace for 100+ Degrees

An Extreme Heat Warning has been issued for San Diego County Inland Valleys from October 4 to October 8, with temperatures expected to reach 103 degrees, prompting urgent safety measures to prevent heat-related illnesses.

Staff Writer
10/04/2026 · Chula Vista edition

Residents in the San Diego County Inland Valleys are urged to take immediate precautions as an Extreme Heat Warning has been issued by the National Weather Service (NWS) San Diego, CA. Dangerously hot conditions, with high temperatures reaching the upper 90s to 103 degrees Fahrenheit, are expected.

The warning is effective immediately, beginning October 4 at 4:28 AM PDT, and will remain in effect until 8:00 PM PDT on Thursday, October 8. This heat event also includes warm nights, with low temperatures anticipated to be in the lower to mid 70s.

Heat-related illnesses are a significant concern during extreme heat events. To protect yourself and others, the NWS advises drinking plenty of fluids, staying in an air-conditioned room, and staying out of the sun. It is also crucial to check up on relatives and neighbors, especially those who may be vulnerable.

Furthermore, never leave young children or pets in unattended vehicles. Car interiors can reach lethal temperatures rapidly, posing severe risks. The affected area specifically includes the San Diego County Valleys.

Related Topics

Editorial Transparency
Source not recorded

Article Ratings

Factual
0.0
Likeable
0.0
Bias
0.0
Objective
0.0

How do you feel about this story?

Discussion (0)

Join the Conversation

Join the conversation

Sign in to share your thoughts, reply to readers, and like comments.

Sign in to comment
Sort by:
0 comments

No comments yet. Be the first to comment!

Trending Now

Trending stories will appear here.

More from Chula Vista

No other local stories are available right now.

Events & Things to Do

Read section →

Upcoming events will appear here.

Keep Reading

Related Stories

More weather stories from Chula Vista

weather

Extreme Heat Warning for Santa Ana Mountains, Foothills

An Extreme Heat Warning has been issued for the Santa Ana Mountains and Foothills, with dangerously hot temperatures up to 100 degrees Fahrenheit expected from today until Thursday, October 8; residents are advised to take precautions against heat-related illnesses and avoid leaving children or pets in vehicles.

Read Story →
weather

Extreme Heat Warning Issued for San Diego Coastal Areas

An Extreme Heat Warning is in effect for San Diego County Coastal Areas until Thursday, October 8, with dangerously hot conditions and high temperatures from the mid-80s to low 100s expected.

Read Story →
weather

Extreme Heat Warning Issued for San Diego Coastal Areas

An Extreme Heat Warning is in effect for San Diego County Coastal Areas until Thursday, October 8 at 8:00 PM PDT, with dangerously hot conditions and warm nights expected; residents should take precautions against heat-related illnesses.

Read Story →
weather

Extreme Heat Warning: Santa Ana Mountains and Foothills to Face 100°F

An Extreme Heat Warning has been issued for the Santa Ana Mountains and Foothills, with temperatures up to 100°F expected from tonight, October 3, until Thursday, October 8. Residents should drink fluids, stay in air-conditioned areas, and never leave children or pets in cars.

Read Story →
weather

Extreme Heat Warning: San Diego Inland Valleys to Hit 103 Degrees

An Extreme Heat Warning is in effect for San Diego County Inland Valleys from October 3 at 9:40 PM PDT until October 8 at 8:00 PM PDT, with temperatures up to 103 degrees Fahrenheit.

Read Story →
weather

Extreme Heat Warning for Santa Ana Mountains and Foothills Until Thursday

An Extreme Heat Warning is in effect for the Santa Ana Mountains and Foothills until Thursday, October 8, 2026, with temperatures up to 102 degrees expected; residents should take immediate precautions to prevent heat-related illnesses.

Read Story →
Scroll for more stories