Detecting respiratory illness in earthquake evacuation shelters

Earthquakes can turn a routine respiratory infection into a fast-moving public-health concern. In temporary shelters, people sleep close together, share bathrooms and meal areas, and may arrive with limited medication, damp clothing, or untreated chronic illness. These conditions make coughs, fever, sore throats and breathing difficulty important signals, even before a diagnosis is confirmed.

Syndromic surveillance for acute respiratory infections in temporary shelters after earthquakes provides an early-warning layer for emergency health teams. It uses symptoms, care-seeking patterns and operational reports to identify unusual increases, guide testing and support practical action while laboratory results are still pending.

Why shelters create respiratory risks

Evacuation centres often bring together people from different neighbourhoods and age groups. Babies, older people, pregnant women and residents with asthma or chronic obstructive pulmonary disease may be especially vulnerable. A shelter can also house people who have travelled through several locations, making it difficult to know where an infection began or whether several cases share a common exposure.

The physical environment adds pressure. Poor ventilation, portable heaters, wet bedding and crowded sleeping areas can increase the spread of influenza, respiratory syncytial virus, COVID-19 and other respiratory pathogens. Dust from damaged buildings may irritate airways, while smoke from generators or cooking equipment can produce symptoms that resemble infection.

The first warning may be operational rather than clinical. A shelter coordinator might notice that more residents are asking for masks, that the first-aid desk is recording repeated fever complaints, or that ambulance transfers for shortness of breath are rising. Bringing these observations together gives public-health authorities a clearer picture than relying on confirmed cases alone.

What the system can detect early

Syndromic surveillance monitors groups of symptoms and related behaviours rather than waiting for a named disease. Relevant indicators can include fever with cough, sore throat, wheezing, shortness of breath, difficulty breathing, unusual fatigue and increased use of reliever inhalers. Data can come from shelter medical posts, nearby general practices, emergency departments, pharmacies, ambulance services and laboratories.

The approach is valuable because the signal can appear before test results are available. A cluster of people with acute respiratory symptoms may prompt infection-control measures, targeted testing or a review of ventilation. It may also show that an apparent outbreak is actually driven by cold exposure, dust, smoke or carbon monoxide. Guidance on carbon monoxide clusters is relevant when generators, gas appliances or portable heaters are used in or near enclosed shelter spaces.

Data quality matters as much as data volume. Shelter teams need simple case definitions, consistent recording times and clear separation between new symptoms and ongoing conditions. A short electronic form can capture age group, location, symptom onset, severity, referral and whether the person lives in a shared sleeping area. Paper forms remain useful when power or connectivity is unreliable, provided someone enters the information into a central system later.

How information moves from shelter to response

A workable model uses several channels that reinforce each other. A shelter health post can submit daily counts of respiratory presentations, while local pharmacies report unusual demand for cough medicines, antivirals or asthma treatments. Hospitals contribute emergency-department attendance and admission data, and ambulance services provide information about breathing-related call-outs. Laboratory testing then helps identify the pathogens behind emerging patterns.

Japan’s multi-channel surveillance experience illustrates why different sources are useful together. Clinic, hospital, pharmacy, school, elderly-care and laboratory information can provide a broader view of community transmission than any single dataset. In an Australian disaster response, the equivalent network may include state or territory health departments, local health districts, community pharmacies, Aboriginal Community Controlled Health Services and the Australian Health Protection Principal Committee.

A dashboard should support decisions rather than simply display numbers. Alerts might be based on a rise above the shelter’s recent baseline, an increase in severe symptoms, several linked cases in one sleeping zone, or a change in the age profile of patients. Thresholds should be flexible because a small remote evacuation centre may generate only a handful of consultations each day.

Privacy must be built into the process. Shelter reports generally need aggregated counts, age bands and location codes rather than names. Individual information should be shared only when necessary for care, contact tracing or statutory reporting. Clear governance is especially important after an earthquake, when multiple agencies may be working under urgent conditions and residents may feel uncertain about how their information is being used.

Australian conditions that shape field practice

Australian shelters can look very different depending on the setting. In a Brisbane community hall, humidity and limited air movement may be the main concerns, while a temporary site near Lismore can face damp floors, mould and flood-related displacement after a compound disaster. In regional New South Wales or Victoria, overnight cold can lead people to use heaters in spaces that were never designed for sleeping.

Distance changes the surveillance picture as well. A shelter in western Queensland or the Northern Territory may be many hours from a hospital, with limited pathology collection and intermittent internet access. A rise in respiratory symptoms may therefore need a phone-based escalation pathway, telehealth support and a plan for transporting severe cases. Local knowledge from Aboriginal health workers, remote-area nurses and community leaders can help distinguish ordinary seasonal illness from an unusual cluster.

Australian communication also needs to sound practical and respectful. Residents may say they are “crook”, “bung”, “short of breath” or simply “not travelling well”, rather than use clinical terms. Staff should record the person’s own description alongside a standard symptom category. Translators and culturally safe communication are essential, particularly where English is not the first language or where past experiences with authorities affect willingness to report illness.

The pharmacy channel can be particularly useful because many Australians seek advice from a local pharmacist before attending a doctor. A sudden increase in requests for cold-and-flu products, inhalers or thermometers around an evacuation centre may provide an early prompt. Pharmacy data should be interpreted carefully, since donated supplies, stock shortages and changes in opening hours can distort apparent demand.

Turning signals into protective action

An alert should lead to a defined response. The first step may be a rapid verification call to the shelter, followed by a review of symptoms, sleeping arrangements, ventilation and recent arrivals. If several people have fever and cough, staff can increase access to masks, improve hand hygiene, separate symptomatic residents where possible and arrange clinical assessment without creating barriers to care.

Respiratory illness is not the only explanation for breathing complaints. Dust, smoke, anxiety, asthma, heat stress and carbon monoxide exposure can produce overlapping symptoms. Severe headache, dizziness, confusion, weakness or multiple people becoming unwell in the same enclosed area should trigger urgent consideration of poisoning and immediate movement to fresh air, while emergency services investigate.

Testing should be targeted to answer operational questions. If a cluster is concentrated among children, testing may help clarify whether influenza, RSV or another virus is circulating and whether paediatric services need additional support. Resources describing severe respiratory illness in children can help teams think about warning signs and escalation, especially when young children are sharing crowded accommodation.

Public messaging should be timely and specific. Residents need to know where to seek care, which symptoms require urgent help, how to improve ventilation and whether masks are recommended in particular areas. Messages should avoid implying that every cough represents an outbreak. A calm explanation of what is being monitored can reduce rumours and encourage people to report symptoms early.

A practical signal set for field teams

The most useful indicators are those that staff can collect consistently during a disrupted response. A compact surveillance form should focus on measures that can change a decision, such as whether to open an isolation area, request testing, bring in extra clinicians or transfer a patient.

Useful daily indicators include:

• New residents reporting cough, fever or sore throat
• People presenting with wheezing or breathing difficulty
• Ambulance transfers linked to respiratory symptoms
• Demand for masks, inhalers or cold-and-flu medicines

Severity and location help turn counts into meaningful signals:

• Residents requiring oxygen, urgent review or hospital transfer
• Cases grouped by sleeping area, family group or shelter
• Symptoms beginning within a similar time period
• Staff or volunteers developing similar illness

These measures should be compared with local context. A shelter that receives a large influx of new residents may show a sudden increase in consultations without a true rise in transmission. Conversely, a small but sustained cluster among people sharing one room may deserve rapid action even if the total number is low.

Daily review meetings can combine the data with observations from shelter managers, environmental health officers and clinical staff. The aim is to agree on what has changed, what might explain it and what action will be taken before the next report. That cycle keeps surveillance connected to response rather than turning it into a passive reporting exercise.

Building resilience beyond the emergency phase

Temporary shelter surveillance should continue long enough to identify delayed effects. Respiratory symptoms can rise after several days of crowding, while residents may move between shelters, relatives’ homes and health services. Linking location codes and dates helps authorities see whether a signal is confined to one site or reflects wider community transmission.

Lessons should be recorded while details are fresh. Teams can review whether forms were understood, whether pharmacies could share timely information, whether test collection worked, and whether alerts reached the right decision-makers. This information can improve plans for bushfires, floods, cyclones and future earthquakes, where the same health-system pressures may appear in different combinations.

Preparedness also depends on supplies and relationships. Emergency stores should include masks, thermometers, pulse oximeters, cleaning products and clear instructions for safe heater and generator use. Agreements with local hospitals, pathology providers, pharmacies, councils and community-controlled health services can reduce delays when a shelter opens unexpectedly.

A strong surveillance system respects the people it monitors. Residents should receive useful information in return for the data they provide, and staff should avoid treating evacuation centres as places where illness is expected or residents are blamed. Early detection works best when people feel safe to mention that they are crook, ask for help and follow advice.

Set up a shelter respiratory surveillance protocol before the next emergency: define the indicators, assign reporting responsibilities, establish escalation thresholds and test the process under low-connectivity conditions. Connecting clinical observations with pharmacy, ambulance, hospital and laboratory information can give Australian response teams the time they need to protect vulnerable residents and contain outbreaks early.