Using Panel Data to Understand the Dynamics of Human Behavior in Response to Flooding

The Impact of "Soft" and "Hard" Flood Adaptation Measures on Affected Population's Mental Health: A Mixed Method Scoping Review

BACKGROUND

The frequency and severity of floods has increased in different regions of the world due to climate change. It is important to examine how adaptation measures impact the mental health of individuals affected by these disasters.

OBJECTIVE

The goal of this scoping review was to document the existing studies on the impact of flood adaptation measures in affected populations to identify the best preventive strategies and limitations that deserve further exploration.

METHODS

This study followed the PRISMA-ScR guidelines. Inclusion criteria focused on studies in English or French available in MEDLINE and Web of Science that examined the impact of adaptation measures on the mental health of flood victims. Literature reviews or non-study records were excluded from the analysis.

RESULTS

A total of 857 records were obtained from the examined databases. After 2 rounds of screening, 9 studies were included for full-text analysis. Six studies sought to identify the factors that drive resilience in flood victims, whereas 3 studies analyzed the impact of external interventions on their mental health.

CONCLUSIONS

The limited number of studies demonstrates the need for public health policies to develop flood adaptation measures that can be used to support the mental health of flood victims.

Assessing key behavioural theories of drought risk adaptation: Evidence from rural Kenya

The Horn of Africa Drylands are increasingly experiencing severe droughts, which impose a threat on traditional livelihood strategies. Understanding adaptation behavior in rural communities is key to helping reduce the impact of these droughts. We investigate adaptation behavior by assessing four established economic and social psychological theories on decision making under risk: expected utility theory (EUT), rank dependent utility theory (RDU), protection motivation theory (PMT), and theory of planned behavior (PMT). To measure adaptation behavior and the theory constructs, we conducted a household survey in Kenya (N = 502). Regression analysis shows that the economic theories (EUT and RDU) have the best fit for our data. Risk and time preferences are found to play an important role in adaptation decisions. An analysis of differences in decision making for distinct types of adaptation measures shows that risk averse (agro-)pastoralists are more likely to implement adaptation measures that are adjustments to their current livelihood practices, and less willing to invest in adaptation measures that require a shift to other livelihood activities. Moreover, we find significant effects for elements of the social psychological theories (PMT and TPB). A person's belief in their own ability to implement an adaptation measure (perceived self-efficacy) and adaptation by family and friends are important factors in explaining adaptation decisions. Finally, we find that the type of adaptation measures that people implement is influenced by, among others, gender, education level, access to financial resources, and access to government support or aid. Our analysis gives insights into the drivers of individual adaptation decisions, which can enhance policies promoting adaptation of dryland communities.

From believing in climate change to adapting to climate change: The role of risk perception and efficacy beliefs

Are people more inclined to adapt to climate change if they believe that climate change is real, caused by human behavior, and/or brings negative consequences? Previous studies provided inconclusive results on the relationship between climate change perceptions and adaptation behavior. Using a longitudinal approach, we examined whether risk perception, self-efficacy, and outcome efficacy play a role in how and when climate change perceptions are associated with adaptation to pluvial flooding and heat stress in the Netherlands. As expected, stronger climate change perceptions were associated with stronger perceptions of climate-related risks, which in turn lead to stronger intentions to implement adaptation measures. Yet, neither climate change perceptions nor risk perception were associated with whether people had actually implemented adaptation measures during a 1-year period. Contrary to common assumptions in the literature, higher levels of perceived self-efficacy and outcome efficacy did not strengthen the relations between climate change perceptions and adaptation intentions and behavior. Rather, higher levels of self-efficacy and outcome efficacy were directly related to stronger intentions to take adaptive measures and taking those measures within a period of 1 year. Exploratory analyses offered initial support for a sequential model where climate change perceptions lead to higher levels of perceptions of specific climate-related risks, which in turn lead to stronger self-efficacy and outcome efficacy, ultimately increasing adaptation intentions, but not actual behavior. Strategies to promote adaptation behavior could aim to remove behavioral barriers to increase self-efficacy, and strengthen outcome efficacy, enabling people to act on their climate change perceptions.

Do actions reduce perceived risk? A longitudinal analysis of the relationship between risk perception and actions in response to forest disturbance in Colorado

As residents living in hazard-prone areas face on-going environmental threats, the actions they take to mitigate such risks are likely motivated by various factors. Whereas risk perception has been considered a key determinant of related behavioral responses, little is known about how risk mitigation actions influence subsequent perceived risk. In other words, do actions to prevent or mitigate risk reduce risk perception? This longitudinal study considers the dynamic relationships between risk perception and risk-mitigating behavior in the context of forest disturbance in north-central Colorado. Based on panel survey data collected in 2007 and 2018, the results provide a first look at changes in perceived forest risks as they relate to individual and community actions in response to an extensive mountain pine beetle outbreak. Analysis revealed that the perception of direct forest risks (forest fire and falling trees) increased, whereas indirect forest risk perception (concern on broader threats to local community) decreased across the two study phases. Higher individual or community activeness (level of actions) was associated with subsequent reductions in perceived forest fire risk, smaller increases in direct risk perception, and larger decreases in indirect risk perception. These findings contribute insights into the complex risk reappraisal process in forest hazard contexts, with direct implications for risk communication and management strategies.

The potential for property-level flood adaptation as a flood disaster mental health intervention

OBJECTIVES

This study aimed to discuss the overlap between property-level flood adaptation and public health and flood risk management and identify areas of future research.

DESIGN AND METHODS

A short essay-based contribution arguing in favour of a future research direction from the perspective of a disaster risk researcher.

RESULTS

Promoting property-level flood adaption has multiple areas of benefit to both flooding and mental health risk management as a potential invention. This is because both fields display common interests in enabling and promoting personal responsibility to limit disaster consequences and build resilience.

CONCLUSIONS

The promotion and development of property-level flood adaptation strategies can be a productive locus of behaviour for further active collaboration and research, as well as a joint intervention for improving human welfare postdisaster. However, more proactive research is required.

One and done? Exploring linkages between households' intended adaptations to climate-induced floods

As climate change increases the probability and severity of natural hazards, the need for coordinated adaptation at all levels of society intensifies. Governmental-level adaptation measures are essential, but insufficient in the face of growing risks, necessitating complementary action from households. Apprehending the drivers of household adaptation is critical if governments are to stimulate protective behavior effectively. While past work has focused on the behavioral drivers of household adaptation, little attention has been paid to understanding the relationships between adaptation measures themselves-both previously undergone and additionally (planned) intended adaptation(s). Using survey data (N = 4,688) from four countries-the United States, China, Indonesia, and the Netherlands-we utilize protection motivation theory to account for the behavioral drivers of household adaptation to the most devastating climate-driven hazard: flooding. We analyze how past and additionally intended adaptations involving structural modification to one's home affect household behavior. We find that both prior adaptations and additionally intended adaptation have a positive effect on intending a specific adaptation. Further, we note that once links between adaptations are accounted for, the effect that worry has on motivating specific actions, substantially lessens. This suggests that while threat appraisal is important in initially determining if households intend to adapt, it is households' adaptive capacity that determines how. Our analysis reveals that household structural modifications may be nonmarginal. This could indicate that past action and intention to pursue one action trigger intentions for other adaptations, a finding with implications for estimating the speed and scope of household adaptation diffusion.

As California burns: the psychology of wildfire- and wildfire smoke-related migration intentions

Climate change impacts and rapid development in the wildland-urban interface are increasing population exposure and vulnerability to the harmful effects of wildfire and wildfire smoke. The direct and indirect effects of these hazards may impact future mobility decisions among populations at risk. To better understand how perceptions and personal experience inform wildfire- and smoke-associated migration intentions, we surveyed a representative sample of 1108 California residents following the 2020 wildfire season. We assessed the associations between threat appraisal, coping appraisal, personal experience, migration intentions, the impact of wildfire and smoke on migration intentions and place satisfaction, and the potential likelihood of future migration. Results indicate that roughly a third of our sample intended to move in the next 5 years, nearly a quarter of whom reported that wildfire and smoke impacted their migration decision at least a moderate amount. Prior negative outcomes (e.g., evacuating, losing property) were associated with intentions to migrate. Perceived susceptibility and prior negative outcomes were associated with a greater impact of wildfire and smoke on migration intentions. For those intending to remain in place, prior negative outcomes were associated with a greater impact of wildfire and smoke on place satisfaction, which was in turn associated with a greater reported likelihood of future migration. Our findings suggest that perceptions of and experiences with wildfire and smoke may impact individual mobility decisions. These insights may be leveraged to inform risk communications and outreach campaigns to encourage wildfire and smoke risk mitigation behaviors and to improve climate migration modeling.

Supplementary Information

The online version contains supplementary material available at 10.1007/s11111-022-00409-w.

Contextualizing cross national patterns in household climate change adaptation

Understanding social and behavioral drivers and constraints of household adaptation is essential to effectively address increasing climate-induced risks. Factors shaping household adaptation are commonly treated as universal; despite an emerging understanding that adaptations are shaped by social, institutional, and cultural contexts. Using original surveys in the United States, China, Indonesia, and the Netherlands (N=3,789) - we explore variations in factors shaping households' adaptations to flooding, the costliest hazard worldwide. We find that social influence, worry, climate change beliefs, self-efficacy, and perceived costs exhibit universal effects on household adaptations, despite countries' differences. Disparities occur in the effects of response efficacy, flood experience, beliefs in governmental actions, demographics, and media, which we attribute to specific cultural or institutional characteristics. Climate adaptation policies can leverage on the revealed similarities when extrapolating best practices across countries, yet should exercise caution as context-specific socio-behavioral drivers may discourage or even reverse household adaptation motivation.

(Almost) all Quiet Over One and a Half Years: A Longitudinal Study on Causality Between Key Determinants of Private Flood Mitigation

Previous studies do not agree on the strengths and directions of the effects between risk appraisal, nonprotective, and protective responses in private flood mitigation. This may be due to the widespread use of cross-sectional survey designs, which infer causality from theoretical considerations alone. The present longitudinal study, in contrast, builds on the logic that cause precedes effect to confirm the direction of effects. Drawing on two-wave survey data from 554 flood-prone households in Austria, cross-lagged autoregressive models analyze pairwise combinations between risk perception, fear, five nonprotective responses (fatalism, denial, wishful thinking, reliance on social support, reliance on public protection), and seven specific protective responses (ranging from coordination with neighbors to structural modifications of the building). These factors show substantial temporal stability, in particular for nonprotective responses and fear. Only in very few instances can effects over time be confirmed statistically. Nonprotective responses emerge as the major drivers; foremost, denial, and reliance on public protection limit private flood mitigation. This overall null finding on causality may trace back to the 1.5 years' time span and the absence of any policy intervention or flood disaster between survey waves, and the high stability of protection motivation theory components. This finding puts into question the theoretically assumed causal relationships and the effects found in cross-sectional studies. The high trait-like stability requires perseverance in risk management efforts to change attitudes and capabilities. Finding nonprotective responses as key determinants in an overall picture of stability suggests that this factor merits a stronger role in future risk research.