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Heat Advisory — Santa Ana Mountains and Foothills Severity: Moderate. Certainty: Likely. * WHAT...For the Heat Advisory, high temperatures in the 90s expected. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the mid 90s to 105 expected. * WHERE...Santa Ana Mountains and Foothills County. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Increasing temperatures into the middle of next week will increase the threat of heat-related illness across populations.
The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.