Ask 中文
← Datasets

Datasets

Civil Defence Shelter and Warning Rules

Durable SCDF and Civil Defence Shelter Act anchors for Public Warning System signals, annual familiarisation soundings, new-dwelling shelter provision, and owner-occupier household-shelter maintenance duties.

Last verified: 2026-08-08 Status: verified

Civil Defence Shelter and Warning Rules

These rows are retrieval anchors for civil-defence warning and shelter obligations. They do not decide whether a specific dwelling is compliant, whether a siren sounding is an exercise or a real emergency, or which three-digit hotline to dial for a personal medical or police crisis.

Public Warning System signals

Signal SCDF situation description Required public action
Alarm Air raid or shelling is imminent Move to a shelter immediately
All Clear The threat is over Leave the shelter
Important Message An important broadcast will follow on radio/TV Tune in immediately to any local FM radio station or free-to-air TV channel

Source: SCDF Public Warning System, accessed 8 August 2026.

Annual Important Message familiarisation sounding

Anchor Value Notes
Dates 15 February and 15 September each year 15 February coincides with Total Defence Day
Time 6:20 p.m. Islandwide PWS sounding
Duration framing About one minute Familiarisation exercise, not an automatic evacuation order
Companion phone alert About 20 seconds on SGSecure when notifications enabled Accompanied by a brief text message about the PWS sounding

Source: SCDF Public Warning System, accessed 8 August 2026.

New-dwelling shelter provision (Civil Defence Shelter Act)

Rule Population / building Obligation
Household shelter in new house Every new house Must be provided with a household shelter in accordance with the specifications
Household or storey shelter in new flatted building Every new building to be subdivided into flats Household shelter in every flat, or at least one storey shelter on that storey in lieu of a household shelter in every flat on that storey
Planning linkage (SCDF narrative) New flats or houses seeking URA planning permission Applications must include household or storey shelters (SCDF About CD Shelter summary of the 1997 Act framework)

Sources: SSO CDSA section 3 and SCDF About Civil Defence Shelter, accessed 8 August 2026. "New house" / "new building" / "new flat" are defined terms in the Act; apply the statute definitions rather than informal age of the building.

Owner or occupier duties for household and storey shelters

Duty Scope Penalty for non-compliance (section 4)
No damaging works without permission Must not carry out or permit repair, alteration, or other acts likely to damage or impair efficient use of the shelter, except with the Commissioner's written permission and conditions Fine not exceeding S$5,000; continuing offence further fine not exceeding S$250 per day or part thereof
Maintain the shelter Maintain in accordance with regulations and the Commissioner's directions Same
Carry out required works Carry out maintenance, alteration, improvement, or equipment installation works the Commissioner requires in writing Same

Source: SSO CDSA section 4, accessed 8 August 2026.

SCDF technical maintenance expectations (household / storey shelters)

Expectation Detail
Structural fabric Do not tamper with the HS/SS door, structural walls, or floor and ceiling slabs
Operability Keep the HS/SS door and ventilation sleeves able to operate smoothly and free of rust
Identification Each HS/SS door has an interior notice identifying the structure and stating prohibited works

Source: SCDF Types of Shelter, accessed 8 August 2026.

Published public-shelter stock (SCDF Types of Shelter page)

Shelter class Count published by SCDF Notes
Underground MRT stations hardened as public shelters 59 As of completion of Thomson–East Coast Line Stage 4; capacity range stated as 3,000–19,000 people depending on station size
HDB residential blocks with shelters 446 Basements or void decks
Secondary-school basement shelters 57 Example peacetime use: air-rifle ranges
Community centre / club shelters 23 Often used by the centres/clubs in peacetime
Other public-development shelters 7 Example peacetime uses: basement carparks, training or activity rooms

Source: SCDF Types of Shelter, accessed 8 August 2026. Counts are agency-published inventory figures, not a guarantee of space for every resident at every location.

Record details

Also known as
[]
Jurisdiction
SG
What each row represents
one PWS signal meaning, annual sounding anchor, or CDSA shelter provision/maintenance duty
Update cadence
after SCDF revises PWS guidance or CD Shelter Act / technical requirements change
Source format
markdown

Dates describe this record’s own period and applicability. A verification date does not mean a rule is currently in force.

Sources

Collection as of 2026-10-07 · An expanding collection. Published counts show available knowledge, not complete coverage of Singapore.