The sample consisted of 63.0% male and 36.8% female participants with an average age of 52.7 years. The households consisted of 5.0 persons (mean) with a range of 1 to 25 persons per household. The majority had a high school degree (45.2%) or graduate level degree (29.8%), a minority attended only middle schools (15.5%) or primary or monastic schools (8.2%) (Fig. 2a). The main income sources were either shop-keeping and small trade (27.5%) or being dependent on other income (20.9%), or retired (14.5%). Other income sources were handcraft and services (14.3%), private employment (10.0%), and others (12.8%; government employment, casual workers, farmers/fishermen, students) (Fig. 2b).
4.1. Coping with supply insufficiencies in urban areas
Most respondents (71.6%) stated that they had prepared medical provision for the case of a medical emergency. However only 25.9% of those had first-aid kits at home or separately noted contact numbers of doctors or health stations (25.2%). Most people see medical provision only in the preparation of necessary medicine for family members (89.9%). 28.4% of the households were not prepared at all (Fig. 3a).
In the investigated townships, it is common to use bottled drinking water from barrels (∅= 63.1%) in water dispensers (Ministry of Labour, Immigration and Population 2017a, b, c, d). These barrels contain 20 litres of water and are sold and delivered by mobile water vendors or bought from shops and supermarkets. This trend was reflected in the survey detecting 80.3% of the respondents using drinking water from bottled water. Only 10.7% of the respondents had a small-scaled drinking water supply or opportunities for water purification and were not dependent on these water vendors. The total median number of stored litres of drinking water per household member was 8 litres, including a high range of 1.0 to 95.0 litres per person. However, there was a significant difference (p-value: 0.015) between the townships of Pazundaung (median 10.0 litres) and Dawbon (median 6.7 litres) (Fig. 3e). In total, 60.9% of the households needed to buy water at least every 3 days (Fig. 3c).
That buying frequency is high compared to the buying frequency for dry food. Only 8.8% of the respondents stored dry food for 2–3 days, 19.0% had dry food for one week at home and 12.2% for two weeks. 56.9% stored dry food for one month or longer (Fig. 3d). There was no significant difference in stockpiling of food between townships, education, gender, or occupation. Interestingly, 18.9% did not store dry food at all. Besides a shortage of money (15.2%), many of the reasons for the lack of stockpiling are based on the urban settlement characteristics: people said that shops are nearby (16.7%) and the household buys food daily (19.9%). Consequently, they saw no need (4.5%) for stockpiling dry food. Also, small and single household sizes (7.6%) and less storing space (4.5%) prevented people from stockpiling. The wide variety and availability of street food has changed peoples’ cooking behaviour. Especially in shared living spaces, e.g., for male workers, people did not cook at home at all (7.6%) and, therefore, did not store any food. Other respondents thought that stockpiling food would be unhealthy (9.1%) or they were afraid of vermin infestation or expiring food (4.5%). Finally, 6.1% just did not want to store dry food.
People were asked whether they had alternative cooking facilities and light sources in case of short- and medium-term power cut-offs, which occur relatively frequently. The majority (87.0%) had alternative cooking facilities for times when electricity was interrupted. The main alternative cooking sources were charcoal (42.7%) and gas (42.3%); firewood was less often mentioned (1.8%). Additionally, 88.4% had alternative light sources. The main light sources were LED lights (24.5%). Besides this source, a high variety of alternative light sources were mentioned such as battery-driven torches (11.8%), candles (10.7%) or emergency lights (9.5%), chargeable lights (8.6%), solar lights (1.4%), flashlights (0.9%), or even generators (9.3%) or inverters (6.8%). Explicit knowledge about how long the light alternatives would last could not be assessed. Estimations of how long the LED lights, candles or battery-driven lighting alternatives would last diverged greatly. However, 50% (median) of the respondents said that their light alternatives would last for less than half a day (0.4 days). 25% of the sample had light alternatives for 2 days or less.
The interviewees were also asked whether they had alternative sources of information, for the case when, e.g., television or internet were disrupted. The majority (79.5%) relied on television as a source of information. However, because they need continuous electricity, alternative information sources become relevant during power cuts. 41.3% also used social media and apps mainly from mobile phones (26.5%) to get information. 25.8% mentioned the radio as an information source in case of disasters. Fewer people relied on newspapers (15.1%), mouth-to-mouth information (12.8%) and alarms or sirens (7.3%) (Fig. 3b).
In general, only one of three households had a radio (median 0; mean 0.4), which excludes radios as a household and area covering source of information in case of disasters. In contrast, the median number of mobile phones per household was three; only two households had no mobile phone. There is a significant difference (p-value: 0.013) in numbers of mobile phones per household between Dawbon and the townships Pazundaung and Tamwe (Fig. 3f). Households in the inner urban townships tended to have slightly more mobile phones per household than households in the new towns. Using mobile phones for risk and crisis communication would mean that the access to knowledge is ensured in 95% of the households. Power banks to charge phones are more common than any other alternative power supply (30.7%). This means that some people are prepared for short-term power-cuts but not for longer electric power supply disruptions.
4.2. Knowledge of behaviour during natural hazards and evacuation situations
The household survey in February 2020 revealed that 91.1% of Yangon’s population had already experienced a disaster. Significant correlations (p < 0.01) exist between the different townships and the experiences of cyclones and flooding. While almost all participants in the townships of Tamwe, Dawbon and Thaketa (90.0-91.8%) had already experienced a cyclone, in Pazundaung 73.6 % said they had experienced such an event. We assume that in Tamwe the high number of people who have experienced a cyclone is due to the fact that, within the last years after Nargis, there was an influx of migrants from the Ayeyarwady Delta to Yangon townships, including Tamwe (Pattison et al. 2016; O’Connor 2020). The difference in experiences between Pazundaung and Dawbon and Thaketa is due to the age structure of the survey sample. Even though Dawbon and Thaketa have a younger population than Pazundaung and Tamwe (Department of Population, Ministry of Labour, Immigration and Population 2017), one which might not have experienced cyclones, this age distribution is not reflected in the survey data. In fact, Dawbon and Thaketa have a higher median age (53; 54 years) than Pazundaung (50 years). Younger people might not know or remember if their households had experienced specific extreme events, posing a response bias here.
With respect to flooding experiences, the townships of Dawbon (34.5%) and Thaketa (28.1%) appeared as more exposed than the townships of Tamwe (19.1%) and Pazundaung (10.1%). Only 15.9% of the respondents noted that they had experiences with earthquakes.
Answers to the open questions about behaviour in case of these natural hazards were diverse and, in many cases, contradictive. In case of a tropical cyclone, 34.1% of the households would move to a shelter, 25.3% would stay at home. Both forms of behaviour were mentioned in all townships and by people at all educational levels. Seven percent, mainly from Dawbon and those with high school and graduate degrees, would open the door and windows, probably because, during past cyclones, people were instructed by authorities to do so. However, 2.7% would do the opposite. A small number of people would increase the house’s resistance against cyclones (3.8%) and/or repair damages from the storm immediately (2.4%). Other answers referred to helping (6.5%) or warning (3.0%) family, friends, and neighbours. Also, cooperation with neighbours, organisations, and administration (4.6%) was among the coping and disaster response strategies.
The answers to questions about flooding were less contradictive. 34.0% would evacuate to higher places or lift things up to higher floors. This answer came mainly from participants in Dawbon and Thaketa and also from people with higher educational degrees (high school and graduate school). A clear focus in all townships was on helping family, friends, and neighbours (19.3%) and also on cooperation with neighbours and organisations (7.5%). This factor, however, was only mentioned by people with higher educational degrees. Many people were aware that one of the human-made reasons for flooding are blocked drainages; thus 14.7% would clean or check the drainage system. Fewer people in Pazundaung referred to this aspect but more in Tamwe, Dawbon and Thaketa. Other important strategies were ‘keeping important things for evacuation’ (6.1%), ‘building water barriers and sandbags’ (3.7%), and the ‘construction of boats and life jackets from plastic bottles’ (1.9%).
In case of an earthquake, the majority of respondents would go outside to open spaces (37.1%) or move to unspecified safe places or a shelter (25.7%). In contrast, 14.7% would stay at home. Only 9.3% of the participants, mainly those from Pazundaung and Tamwe and with higher educational degrees, would stay under furniture. 7.7% would also warn or help others.
In all cases of natural hazards, only few people would follow the news and official warnings or weather forecasts (cyclone: 2.4%; flooding: 0.5%; earthquake: 1.4%). Also, the saving of important documents seemed to be neglected before and during disasters (1.6%; 0.0%; 1.4%). While the answers to questions concerning flooding seemed to be more directed and solution focused, the behaviour during tropical cyclones and earthquakes seemed to be highly divers and partly contradictive. This result indicates a gap of knowledge concerning appropriate behaviour during certain natural hazards. Most of the answers came from participants in Dawbon (26–28%). Participants in Thaketa had diverse strategies to reduce flooding disaster risk. Those two townships have comparable, large riverbank areas and are impacted by high tide flooding from time to time. It seems that the geographical location of the townships, and thus previous experience with flooding, has an impact on inhabitants’ behaviour during disasters such as flooding.
In the survey, people were asked for the five most important things to carry in case of evacuation. Many respondents were aware of the main important belongings, such as (i) important documents (122.9%), (ii) money and jewellery, gold and valuables (68.8%), (iii) food and water (49.7%), (iv) clothes (27.0%), and (v) medicine (19.4%). Also, mobile phones (14.2%) as alternative sources of information with charged power banks and light sources (13.7%) were ranked as important belongings. Battery-driven radios (0.3%) were less often mentioned. For the important documents, 227 respondents specified their answers. The mostly mentioned documents were: (i) National Registration Card or identity card (30.8%), (ii) the household census list (12.8%), (iii) bank account documents (4.7%) and (iv) house ownership contract (3.4%). Other documents were less often mentioned but were also very important for preventing the loss of personal property. The extracted list of documents provides a good overview about the perception of important documents. Family photos, owner books, land grant, contracts and medical records – as recommended for Yangon (YCDC et al. 2020) - and vaccination certificates, membership and contribution books of associations or clubs (BBK 2017) should be added to national and international recommendations in lists of personal documents.
4.3. Potentials for better involvement of volunteers for a disaster resilient society
Most respondents (89.3%) were willing to voluntarily support institutions and the general public in disaster management. However, only 3.9% were already involved in voluntary disaster prevention activities. These respondents came mainly from Dawbon and Thaketa. As mentioned, many people are concerned about helping family, friends, and neighbours in emergency cases. This civil society attitude of caring provides a high potential for increasing and improving current disaster prevention on a cost-efficient and voluntary basis. People want to cooperate with civil society organisations (62.2%), the neighbourhood (48.7%), or with governmental administrative units (44.2%). Surprisingly, only 6.9% would like to cooperate with religious communities in terms of voluntary actions of disaster prevention (Fig. 3g). Religious institutions and religious buildings, however, play an important role in disaster response (Table 2) since the majority of people would search for a safety shelters in monasteries and other religious buildings (85.0%). Also, public buildings such as schools, ward administrative offices, community halls etc. were mentioned as safe shelters (36.0%).
The survey also collected ideas for voluntary activities. They ranged from a general support in form of cooperation with neighbours and administration or donations (63.8 %) to more specific ideas for disaster management. Ideas for helping in disaster response were immediate rescue operations, helping those in need, providing/sharing food/water, helping in health care (23 %). For disaster rehabilitation, people would support rebuilding and social affairs (5.7 %). Asked which activities could assist disaster preparedness, respondents mentioned ideas to clean drainages and potential disaster areas and to warn people and increase disaster risk awareness (12 %) (Fig. 3h).