The Forgotten Disasters: 6 Emergencies Nobody Prepares For

The disasters most people prepare for — hurricanes, earthquakes, wildfires — get the headlines, the FEMA advisories, and the cultural attention. They're real threats. They're also not the threats most likely to affect your household in any given year.

The emergencies below don't dominate the news cycle. Some are slow-moving. Some are invisible. Some sound technical until you look at the body count. All of them kill people every year in the United States, Canada, Australia, and the UK — and almost nobody has a plan for them.

1. Extreme Heat: The Deadliest Weather Event That Gets No Respect

Extreme heat kills more Americans than hurricanes, floods, and tornadoes combined in an average year. That sentence has appeared in CDC data and National Weather Service reporting for decades. It has not translated into meaningful household preparedness behavior.

Between 1999 and 2023, heat-related deaths in the U.S. increased from approximately 1,069 to 2,325 per year — a 117% increase. Researchers using excess death methodology — which captures heat deaths that don't appear on death certificates — estimate the real figure may be closer to 11,000 deaths per year in the U.S. alone.

Globally, an estimated 489,000 people die from heat-related causes annually. In the European summer of 2022, a comprehensive analysis found over 61,000 heat-related deaths across 35 countries in a single season.

The reason extreme heat doesn't generate the same preparedness response as hurricanes is simple: it has no visible drama. No debris, no flooding, no collapsed buildings. People die in their homes, in their cars, on sidewalks — from a physiological process that begins as discomfort and ends quietly.

Extreme heat is not listed in the Stafford Act, the federal law that gives FEMA the power to respond to emergencies, meaning that the agency doesn't consider extreme heat a major disaster. There is no federal declaration process. There is no coordinated national response system. It is, structurally, a disaster that doesn't officially exist.

What to prepare:

• Know where your nearest public cooling center is before heat season. Most counties publish lists; FEMA and local emergency management agencies maintain them
• A battery-powered fan provides meaningful relief when power is out; so does moving to the lowest floor (basements are cooler by 10–15°F / 5–8°C than upper floors)
• Check on elderly neighbors and relatives during heat advisories — the majority of heat deaths occur in people over 65 living alone
• Never leave children or pets in parked vehicles. Interior car temperatures can exceed 130°F (54°C) within 20 minutes in direct sun

2. Drinking Water Contamination: The Threat Already in Your Pipes

Most people assume their tap water is safe because it comes from a utility. This assumption has a documented failure rate.

The 2014 Flint, Michigan water crisis — in which lead contamination affected approximately 100,000 residents for over a year before being acknowledged — is the most visible recent example. But it is not an outlier. According to EPA data, there are approximately 153,000 public drinking water systems in the United States. Violations of drinking water standards — including microbiological, chemical, and radiological violations — occur in thousands of systems annually.

In August 2021, CISA documented ransomware attacks on water and wastewater treatment facilities in California, Maine, and Nevada. In 2020, attacks on Israeli water infrastructure were reported. The threat of cyberattacks to water treatment systems is documented, ongoing, and explicitly flagged by CISA and EPA as a significant risk to public health infrastructure.

Beyond cyberattacks, water contamination events happen regularly after flooding, infrastructure failures, and industrial accidents. Every major hurricane and flood event generates boil water advisories. In some cases — as seen in western North Carolina after Hurricane Helene — those advisories last weeks.

What to prepare:

• A portable water filter rated to remove bacteria and a chemical disinfection backup (covered in Post #02) is the most practical household response
• Store a minimum 72-hour water supply — 1 gallon (3.8 liters) per person per day — at all times, separate from tap supply
• Know how to access emergency water advisories for your area through your utility's website and local emergency management alerts
• If you're on a private well: have your water tested annually, know your system, and have a hand pump backup if you're in a grid-dependent area

3. Infrastructure Cyberattack: The Grid Doesn't Have to Be Physically Damaged to Go Down

In February 2021, an attacker gained remote access to the SCADA control system of a water treatment facility in Oldsmar, Florida, and attempted to increase sodium hydroxide levels to 111 times normal — a concentration that would have been highly dangerous to the 15,000 residents served. A vigilant operator caught it in real time. CISA states that 80% of the United States receives potable water from approximately 153,000 public drinking water systems, and any type of attack, including a cyber attack, could result in 'illnesses or casualties and/or a denial of service that would also impact public health and economic vitality.'

The Oldsmar incident remains contested — later reporting raised questions about whether it was an outside hack or internal error. The documented CISA advisories about actual ransomware attacks on water facilities in California, Maine, and Nevada in 2021 are not contested.

Critical infrastructure cyberattacks have broader implications than most people consider. The U.S. power grid, water systems, hospital networks, banking infrastructure, and communications systems all depend on networked software. A successful large-scale cyberattack on any one of these has cascading effects on the others. The 2021 Colonial Pipeline ransomware attack — which disrupted fuel supply across the southeastern U.S. for six days — demonstrated what targeted infrastructure attacks look like in practice.

The preparedness overlap with grid failure is significant: the same 72-hour self-sufficiency baseline, the same water and food storage, the same battery and communication backups. The difference is that a cyberattack-driven disruption may not come with weather warnings or visible precursors.

What to prepare:

• The 72-hour baseline preparedness kit covers the first tier of any infrastructure disruption regardless of cause
• A battery backup or portable power station provides meaningful resilience for a 24–72 hour digital disruption
• Follow CISA's alert feed (cisa.gov/alerts-advisories) for infrastructure threat advisories — they publish public warnings when significant threats are identified

4. Supply Chain Disruption: When the Shelves Go Empty

The COVID-19 pandemic demonstrated at scale what happens when a global supply chain experiences simultaneous disruption: store shelves strip within days, critical medications become scarce, and households that assumed continuous resupply discovered they had 2–3 days of food on hand.

That was a demand-driven disruption. Supply-driven disruptions — port shutdowns, fuel crises, weather events that take out distribution networks, cyberattacks on logistics systems — produce similar results with less warning.

The 2022 baby formula shortage — driven by a combination of supply chain disruption and a single manufacturing facility recall — left millions of American families unable to source a product they depended on daily for infant nutrition, for months. This was not a natural disaster. It was a system fragility problem.

The practical lesson is not that the supply chain will always fail. It's that the supply chain is not a guarantee, and households that treat it as one are one disruption event away from a serious problem.

What to prepare:

• A 2-week supply of shelf-stable food per household member is the realistic minimum buffer against supply disruption
• Prescription medications: maintain at least a 30-day buffer where your pharmacy and insurance allow — supply chain disruptions affect pharmaceutical availability
• Infant formula or specialized medical nutrition: if your household depends on specific products, maintain a rotation supply of at least 2–4 weeks
• Know where your nearest food bank or community resource center is — in a genuine supply disruption, these become critical infrastructure

5. Carbon Monoxide Poisoning: The Disaster That Happens Inside

Carbon monoxide poisoning kills approximately 400 Americans per year and sends an estimated 100,000 to emergency rooms annually, according to CDC data. It is consistently the leading cause of storm-related deaths — not wind, not water, not structural collapse, but an odorless, colorless gas produced by generators, camp stoves, charcoal grills, and gas appliances operating in inadequate ventilation.

Every year, after every major storm event, the same pattern repeats. Power goes out. People run generators in garages. People bring camp stoves indoors. People run cars in attached garages to stay warm. The CDC publishes warnings before every hurricane season. The warnings don't reach everyone, and every year, people die from exactly the scenarios the warnings describe.

The compounding factor: carbon monoxide symptoms — headache, dizziness, nausea, confusion — are easily mistaken for flu symptoms, especially in children. By the time a household identifies what's happening, the exposure may already be serious.

What to prepare:

• Install battery-powered or battery-backup carbon monoxide detectors on every floor of your home, including the basement. Test them monthly. The Underwriters Laboratories (UL) standard for CO detectors requires them to alarm at 70 ppm sustained for 1–4 hours — look for UL-listed units
• The generator rule is absolute: outdoors only, minimum 20 feet (6 meters) from any window or door, never in a garage even with the door open
• If a CO alarm sounds: leave immediately, leave doors open, call 911 from outside, do not re-enter until cleared

6. Medication Access Failure: The Emergency That Kills Slowly

This is the disaster nobody talks about because it doesn't happen all at once.

Approximately 131 million Americans — roughly 66% of all adults — use at least one prescription medication. A significant portion of those medications are life-sustaining: insulin, blood thinners, seizure medications, psychiatric medications, thyroid medications, cardiac drugs. Missing a dose of many of these is not a minor inconvenience. Missing several days of some of them is a medical emergency.

After a major disaster, pharmacies close. Distribution networks disrupt. Even when pharmacies reopen, they may not have stock. For refrigerated medications, extended power outages destroy supply. The realistic pharmacy access gap after a major regional disaster is 3–14 days — sometimes longer.

CDC data on hurricane aftermath documents this pattern clearly: post-disaster medication access failure is a significant driver of excess deaths in the weeks and months following an event, particularly for cardiovascular disease, diabetes, and mental health conditions.

What to prepare:

• Maintain at least a 7-day buffer of every prescription medication — ideally 30 days. Talk to your physician and pharmacist about a larger emergency supply
• Understand the temperature sensitivity of every medication you take (covered in Post #04). Know what happens to insulin, biologics, or other refrigerated drugs after 24–48 hours without cooling
• Keep a written list of all medications, doses, prescribing physician, and pharmacy contact in your waterproof document bag. In an evacuation, this list gets you emergency access at an unfamiliar pharmacy
• Know your state's emergency prescription access rules — most states have provisions allowing emergency dispensing of a limited supply during declared disasters

The Common Thread

All six of these disasters share the same structural feature: they don't look like disasters until they already are one. They're slow, invisible, invisible, quiet, or so routine that the system treats them as background noise rather than emergency conditions.

The preparation for each of them is not exotic. It's the same baseline infrastructure — water storage, food buffer, medication supply, power backup, CO detection — extended slightly and applied deliberately to the specific failure mode each represents.

The most dangerous assumption in preparedness is that a disaster will announce itself clearly enough and early enough to allow a response. These six don't.

Sources: CDC: Extreme Heat — Leading Cause of Weather-Related Deaths | USAFacts: Heat Deaths in the US | eClinicalMedicine / The Lancet: Increasing Burden of Heat-Related Mortality (2024) | CISA: Ongoing Cyber Threats to U.S. Water Systems (AA21-287A) | CISA: Compromise of U.S. Water Treatment Facility (AA21-042A) | CDC: Carbon Monoxide Poisoning — Facts and Statistics | CDC: Hurricane-Related Medication Access | EPA: Drinking Water System Violations | Congress.gov: Emergency Response to Extreme Heat (CRS Report R46873)