Smart homes—bundles of internet-connected devices that automate comfort, convenience, surveillance, and safety—have moved from novelty to normal. Consumers increasingly use cloud-tethered services for lighting and HVAC, keyless entry, food storage and cooking, irrigation, entertainment, and even medical monitoring. Yet this expanding convenience layer rests on two preconditions that are often fragile in crisis: electricity and connectivity. When the grid goes down or networks are degraded, homes designed to be “frictionless” may quickly become difficult to manage, less secure, and—if medical devices are involved—potentially dangerous.
This essay examines how rising blackout risk intersects with growing household reliance on smart devices. It identifies the vulnerabilities that can emerge when electricity or internet service falter, explores psychological and social dynamics that increase risk, and outlines practical steps households can take to build resilience without abandoning technology’s benefits. It also situates the problem in a broader policy context: a modernizing grid facing weather extremes, aging infrastructure, and cyberthreats at the same time consumers are connecting more devices than ever.
The Modern Smart Home, in Brief
“Smart home” is a catch-all for internet-enabled sensors, appliances, and systems managed via apps, voice assistants, or automation routines. Common examples include smart thermostats, door locks, doorbells and cameras, lighting, smoke and CO alarms, refrigerators and ranges, irrigation controllers, leak sensors, robot vacuums, and an array of health and wellness devices. Adoption has accelerated alongside near-universal smartphone ownership and widespread home broadband access, which serve as the control surface for these devices (Pew Research Center, 2024). The connective tissue—the cloud, Wi-Fi routers, and consumer IoT platforms—unlocks remote control and data-driven automation. But connectivity is also the Achilles’ heel.
While there is debate over the exact percentage of U.S. households with one or more smart devices (estimates vary with definitions and methods), the directional trend is clear: households continue to add connected devices and spend real money doing so, integrating them into everyday routines (Deloitte, 2023; Pew Research Center, 2024). As smart devices proliferate, the number of single points of failure multiplies.
A Grid Under Stress
Electric reliability is no longer a background guarantee in many regions. Multiple factors have combined to elevate outage risk: more frequent and intense heat waves and winter storms, drought-driven wildfires, aging infrastructure, changing generation mixes with different flexibility characteristics, soaring peak demand from electrification and data centers, and transmission build-out that has lagged behind need. The North American Electric Reliability Corporation (NERC) has repeatedly warned that large swaths of the U.S. face elevated risks of supply shortfalls during extreme conditions (NERC, 2024a; NERC, 2024b).
The 2021 Texas winter storm (Winter Storm Uri) remains a stark case study: cascading failures across natural gas supply, generation, and demand response contributed to days-long outages affecting millions; hundreds died from associated causes (FERC, NERC & Regional Entity Staff Report, 2021/2021a). In the West, utilities increasingly employ Public Safety Power Shutoffs (PSPS)—deliberate, precautionary outages to avoid ignitions during wind events—placing reliability and safety into direct tension for high-fire-threat areas (California Public Utilities Commission, 2025). Meanwhile, federal auditors have underscored persistent cyber risks to grid operations and the need to improve coordination across agencies responsible for protecting critical infrastructure (U.S. Government Accountability Office, 2024).
The upshot is not panic but prudence: the probability of localized, multi-hour (and sometimes multi-day) outages has risen for many consumers. That risk profile matters more in a home where locks, life safety, and daily functions depend on power and network availability.
Hidden Vulnerabilities of Smart Homes During Outages
1) Power Dependence Beyond the Obvious
In a conventional home, the lights go out and most other systems either fail “open” (you can still use a mechanical key) or fail safely. In a smart home, more everyday actions may become power-dependent: keyless entry, powered deadbolts, automated garage doors, induction cooktops, networked smoke alarms, and refrigerator health notifications are all electricity-reliant. When backup batteries exist, their runtime may be measured in hours, not days. If a refrigerator warms, stored insulin or other temperature-sensitive medications can spoil—an example of a household-level failure with health implications.
2) Cloud and Connectivity Fragility
Many devices degrade significantly without internet access, even when local power is present (e.g., during ISP outages or cell network congestion). Cloud authentication may block local control; camera recordings that rely on cloud storage stop; voice assistants go silent. If the router or modem lacks backup power, the “brain” of the smart home dies even if the utility outage is brief. Because the value of many devices is tied to remote control and alerts, network loss erodes the core benefit at precisely the wrong time.
3) Security Systems That Fail “Dumb”
Door locks and security devices that depend on apps, hubs, or Wi-Fi can become unresponsive during outages. Some locks default to a failsafe state that is less secure; others remain locked but cannot be operated electronically—problematic if residents have come to rely on phone-as-key and don’t carry physical keys. Garages with disabled openers can trap vehicles; exterior cameras go dark, potentially at times of heightened criminal opportunity in darkened neighborhoods.
4) Medical and Assistive Devices
Smart medical devices—from CPAPs and oxygen concentrators to home dialysis and cardiac monitors—are increasingly integrated with apps and cloud dashboards. The FDA has issued preparedness guidance emphasizing power and supply continuity for such equipment (U.S. Food and Drug Administration, 2024a; 2024b). For households depending on powered devices for therapy or monitoring, a grid failure is not merely inconvenient: it can be life-threatening unless backup power and contingency plans are in place.
5) Cyber-Physical Complications
A sophisticated cyberattack that degrades parts of the grid or targets internet infrastructure can compound physical outages with network disruptions. Government watchdogs have stressed the need to harden operational technology (OT) and improve information sharing to reduce systemic risk across sectors, including energy (U.S. Government Accountability Office, 2024). Consumer IoT itself has known weaknesses—weak default credentials, inconsistent patching, cloud supply-chain dependencies—that can introduce new attack surfaces in the home. CISA has published acquisition guidance to help buyers evaluate and mitigate these risks before devices enter critical workflows (Cybersecurity and Infrastructure Security Agency, 2022).
Psychological and Social Risk Factors
Technology can create an illusion of control. Routines and automations lull us into believing systems will always work as expected. That confidence can displace analog backups and skills: people stop carrying physical keys, forget manual garage releases exist, and never practice “dark mode” living. Outages then become paralyzing rather than inconvenient. There is also a social dimension: outage-wide darkness increases opportunity for opportunistic crimes, while disabled alarms and cameras degrade deterrence and evidence capture. In this way, highly connected homes can become more attractive targets during blackouts unless households plan for degraded states.
Building Household Resilience Without Abandoning Technology
The goal is not to reject smart homes but to design for graceful degradation—ensuring core functions continue when power or internet fail.
1) Redundancy and “Analog First” Mindset
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Carry physical keys and confirm every exterior door has a mechanical override. If using smart locks, verify battery life and practice manual operation.
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Keep a manual garage release tool accessible.
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Maintain non-networked smoke/CO detectors alongside smart versions or ensure the smart model works fully without cloud and has long-life battery backup.
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For refrigeration, thermometers with audible alarms provide a power-agnostic check; critically, plan for insulated containers and ice to protect medications during extended outages.
2) Power Resilience Layers
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Router/ONT backup: a dedicated uninterruptible power supply (UPS) for modem, router, and a central hub can keep local control and LAN-only devices running for hours.
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Device-level batteries: where available, choose devices with swappable batteries or rechargeable packs and keep spares charged.
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Portable power stations and inverter generators: size solutions for critical loads (medical devices, refrigeration, communications). Operate generators safely, with proper ventilation and transfer switches.
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Solar + storage: home battery systems paired with rooftop solar can island during outages if configured with critical-load panels; even modest storage can sustain essentials.
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Car-to-home options: some EVs and hybrid vehicles support export power for essential circuits; understand limits before an emergency.
3) Connectivity Contingencies
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Multi-path internet: where feasible, maintain failover from cable/fiber to a cellular hotspot (with its own power bank).
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Prefer devices that retain local control (e.g., via Bluetooth, Zigbee/Z-Wave, Matter over Thread) even when the cloud is down; verify this in documentation.
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Local storage for cameras (microSD or local NVR) avoids total loss of security visibility when cloud access fails.
4) Smart Device Procurement with Security in Mind
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Use CISA’s IoT acquisition considerations to evaluate devices: patchability, SBOM/transparency, secure defaults, and offline functionality (CISA, 2022).
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Change default passwords, enable MFA where supported, and segment IoT devices on a guest or VLAN network to limit lateral risk.
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Favor vendors with clear update policies and long support windows; avoid orphaned ecosystems.
5) Medical Device Preparedness
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Ask your clinician and the manufacturer about battery options, runtime, and generator compatibility.
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Register with your utility and local fire department if someone in the home depends on powered medical devices; many utilities maintain medical baseline or priority restoration lists (FDA, 2024a).
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Stock spare consumables and practice switching to backup power to reduce transition risk.
6) Practice “Dark Drills”
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Twice a year, run a two-hour blackout drill: kill the main breaker (if safe to do so) or simulate by unplugging nonessential circuits. Test door access, lighting, communication, refrigeration plans, and medical device continuity.
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Document a household outage plan: who does what, in what order, and where backups are stored.
Community and Policy Dimensions
Household resilience sits within broader infrastructure choices. Three themes are especially relevant:
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Grid hardening and weatherization. Post-event investigations like the Winter Storm Uri report emphasize weatherization across fuel supply and generation, better winter planning, and improved load shed protocols to prevent catastrophic cascades (FERC/NERC, 2021/2021a). Policymakers and regulators must convert lessons learned into enforceable standards and continuous exercises.
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Decentralization and microgrids. Community microgrids, critical-facility islands, and neighborhood-level solar-plus-storage can reduce widespread outages and keep essential services operating. Thoughtful interconnection rules and cost-sharing mechanisms can accelerate deployment, but planning must account for cyber and operational risks so that decentralization doesn’t introduce new fragility.
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Cybersecurity across sectors. GAO’s 2024 reviews call for improved coordination between CISA and sector risk management agencies and better measurement of cybersecurity practice adoption—particularly for operational technology (U.S. Government Accountability Office, 2024). As consumer IoT expands, clear labeling, minimum security baselines, and long-term support commitments can reduce household exposure and systemic risk.
Finally, public safety shutoffs present a special case: they can save lives by preventing wildfires, but they also shift risk to households—especially those dependent on powered medical devices. Transparent criteria, granular targeting, robust notification systems, and utility-provided support (e.g., community resource centers, device charging, refrigeration) are essential to make PSPS as safe and tolerable as possible (California Public Utilities Commission, 2025).
Conclusion: Designing for Graceful Degradation
Smart homes are here to stay. They can save energy, enhance safety, and simplify life. But when the grid goes down or networks fail, their very intelligence can turn into brittleness if we haven’t designed for failure. The answer is not to abandon technology—it’s to pair it with redundancy, local control, and practiced contingency plans. Treat internet and power like the critical dependencies they are. Choose devices that still function offline. Keep analog fallbacks for entry, cooking, lighting, and signaling. Plan for medical device continuity. Drill the plan.
The smartest home is the one that stays functional when the world outside isn’t. Build for that day, and every other day gets better too.
References
California Public Utilities Commission. (2025). Public Safety Power Shutoffs (PSPS). Retrieved September 2025.
Cybersecurity and Infrastructure Security Agency. (2022). Internet of Things (IoT) acquisition guidance document. U.S. Department of Homeland Security.
Deloitte. (2023). 2023 connectivity and mobile trends survey. Deloitte Insights.
Federal Energy Regulatory Commission, North American Electric Reliability Corporation, & Regional Entity Staff. (2021/2021a). The February 2021 cold weather outages in Texas and the South Central United States: FERC, NERC and Regional Entity staff report. Federal Energy Regulatory Commission.
North American Electric Reliability Corporation. (2024a). 2024 Summer Reliability Assessment. NERC.
North American Electric Reliability Corporation. (2024b). 2024 Long-Term Reliability Assessment. NERC.
Pew Research Center. (2024). Internet and broadband fact sheet. Pew Research Center.
U.S. Food and Drug Administration. (2024a). FDA offers tips about medical devices and natural disasters. U.S. Department of Health and Human Services.
U.S. Food and Drug Administration. (2024b). Emergency preparedness and medical devices: Supply chain recommendations. U.S. Department of Health and Human Services.
U.S. Government Accountability Office. (2024). Electricity markets, grid security and resilience: High-risk series highlights (GAO-24-107231). GAO.



