Thermal Structures, Inc. layoff notices at a glance
Thermal Structures, Inc. has filed 5 WARN notices with the California Employment Development Department between Oct 18, 2018 and Sep 2, 2025, naming 1,238 workers. 4 were closures and 1 was a layoff; 0 permanent, 5 temporary. The largest single notice named 447 workers in Riverside County on Sep 2, 2025. Its latest notice, 447 workers in Riverside County dated Sep 2, 2025, was 10% of the 4,479 workers named in all 61 Riverside County notices of fiscal year 2025-2026. 1 of the notices show fewer than 60 days between the notice date and the effective date (see how to read this). The same employer appears in 2 U.S. Labor Department wage and hour investigations, with no violations found.
Every notice, newest first
| Notice date | Effective | County | City | Workers | Type | Days notice |
|---|---|---|---|---|---|---|
| Sep 2, 2025 | Nov 24, 2025 | Riverside | Corona | 447 | Closure, temporary | 83 |
| Sep 26, 2024 | Nov 25, 2024 | Riverside | Corona | 40 | Closure, temporary | 60 |
| Sep 29, 2020 | Oct 23, 2020 | Riverside | Corona | 350 | Layoff, temporary | 24 under 60 |
| Oct 3, 2019 | Dec 23, 2019 | Riverside | Corona | 400 | Closure, temporary | 81 |
| Oct 18, 2018 | Dec 26, 2018 | Riverside | Corona | 1 | Closure, temporary | 69 |
Sites named on the notices
- 2362 Railroad Street Corona CA 92878 (Sep 2, 2025, 447 workers)
Where the notices landed
- Riverside County5 notices, 1,238 workers
- Corona5 notices, 1,238 workers
Local pages: Corona employment lawyer, Riverside County employment law guide.
How to read this record
Notice date is the date on the employer's letter. Effective is the first day of separations it announced. Days notice is the gap between them; California Labor Code 1401 calls for 60 days from a covered employer, and section 1402 makes a short notice worth a day of pay and benefits for every day it is short, up to 60.
For Thermal Structures, Inc. the shortest gap shown is 24 days. That is a reason to check whether an exception in 1401(c) or 1402.5 applied, whether the workers received the letter earlier than the EDD did, and whether anyone was let go before the effective date. It is not, by itself, a finding against the employer.
5 notices are marked temporary. A temporary layoff that runs past six months is treated as a termination under the federal Act, and the employer should issue a new notice before that point.
Full statute walk-through: the California 60-day rule, section by section.
If you work, or worked, at Thermal Structures, Inc.
Keep the notice, every email about the selection, and your final pay stub. A free review covers four things in one call: whether the notice period was honored and paid, whether final pay and vacation payout arrived on time, whether the selection pattern raises an age, pregnancy or leave, or retaliation question, and what a proposed severance release is actually worth before you sign it. Call (800) 371-3088 or send the notice.
Source: California EDD WARN reports, fiscal years 2018-2019 to 2025-2026. Record last checked against the EDD on Oct 30, 2026. Back to the layoff tracker.
About this data: Notices come from the California Employment Development Department WARN reports (fiscal years 2014-2015 to today) and are reloaded from the EDD every Tuesday and Thursday. Employer names appear as the employer wrote them on the notice, grouped where the names clearly refer to the same company. A notice is not a finding that any law was broken. This page is general information, not legal advice about your situation.