Airbnb Still Doesn't Require CO Detectors. The 2026 Lawsuits Prove the Cost.

In February 2025, Hugo Ivan Morales and Laura April Morales — a brother and sister from El Paso — checked into a vacation rental in Mexico City booked through Airbnb. By morning, both were dead. The San Luis Potosí coroner ruled carbon monoxide poisoning. One year later, in February 2026, their family filed a wrongful death lawsuit in San Francisco County Superior Court, alleging that Airbnb did not require property owners to have working carbon monoxide alarms or conduct property inspections for listings with fuel-burning appliances. The lawsuit joins a pattern of CO deaths at short-term rentals that has persisted for years without producing a mandatory safety standard from the platforms that profit from the listings. This post covers the 2026 Morales lawsuit, the Montana family case decided this year, what platform liability actually looks like in court, and what every traveler needs to understand about who is responsible for the air inside a vacation rental. Hotel Carbon Monoxide: Why You Should Bring Your Own Detector

The El Paso Siblings: What Happened in Mexico City

Hugo Ivan Morales and Laura April Morales booked their Mexico City vacation rental through Airbnb's platform, selected from listings that appeared to meet the company's posted safety standards. According to the wrongful death complaint, the rental had no working carbon monoxide alarm. The source of CO was not identified in early reporting — but the coroner's cause of death was unambiguous. The lawsuit, filed February 6, 2026 in San Francisco County Superior Court, alleges that Airbnb 'did not require property owners to have working carbon monoxide alarms or conduct property inspections for listings with fuel-burning appliances.' The complaint is not that a CO alarm malfunctioned. It is that none was required. Airbnb allows hosts to self-certify that their properties meet safety standards. The platform does not conduct independent property inspections. In the case of the Mexico City rental, that self-certification system produced a listing that appeared safe, gave no indication of a CO risk, and was booked by two people who had no reason to expect they needed to supply their own protection. This Portable Travel CO Detector Could Save Your Life Takeaway: The Morales case is not primarily about a malfunctioning appliance — it is about what happens when safety certification is self-reported by the party with the least incentive to report it accurately.

The Montana Baby Case: A 2026 Federal Ruling That Protects the Platform

In February 2026, a California federal judge handed Airbnb a legal victory in a separate CO case with starkly different facts but the same structural failure. A Montana family sued Airbnb after their infant suffered permanent brain damage from CO exposure at a vacation rental in Santa Fe, New Mexico. The family alleged that the property's boiler was 'in a dangerous state of disrepair' and that the rental had no carbon monoxide alarm. Their child was hospitalized; the injury is permanent. The federal judge sided with Airbnb, limiting the company's liability under Section 230 of the Communications Decency Act — the provision that generally shields online platforms from third-party content liability. The ruling illustrates why lawsuits against Airbnb over CO deaths frequently fail even when the facts are extreme: platforms argue that CO safety at a physical property is third-party 'content' for which they bear no responsibility. Carbon Monoxide Detector for Travel: Your Hotel Safety Protocol This legal framework — platform as marketplace, not landlord — means that consumers harmed at Airbnb rentals must typically pursue individual property owners rather than the well-capitalized platform that curated, promoted, and profited from the listing. Takeaway: Section 230 allows Airbnb to benefit economically from a safety-critical marketplace without accepting the safety liability that traditional landlords or hotel operators would carry.

At Least 12 People Died at Short-Term Rentals in One Year

The El Paso siblings are not anomalies. CO deaths at vacation rentals have been documented with increasing frequency as the short-term rental market has grown. Multiple legal and consumer safety analyses have found at least 12 deaths at Airbnb and VRBO-listed properties in a single year — and that figure almost certainly undercounts the actual total, since many CO incidents at rentals are attributed to the poisoning itself rather than identified as platform-related events. The deaths have occurred across the United States, in Mexico, and internationally — at beach cabins, urban apartments, and rural properties — wherever fuel-burning appliances exist in buildings where neither the owner nor the platform has verified that monitoring equipment is functional. Airbnb's policy does not require hosts to install CO detectors; it permits hosts to list 'CO alarm' as an amenity but does not mandate it or verify that the listed detector actually works. Airbnb Safety Checklist: 7 Things to Verify Before Your First Night Airbnb has offered to send free CO detectors to hosts who request them — a voluntary program with no follow-up verification. The gap between 'available to hosts who ask' and 'required in every listing with a fuel-burning appliance' is where people continue to die. Takeaway: Twelve documented deaths at short-term rentals in a single year represents a systemic failure in an industry that has deliberately avoided mandatory safety requirements.

What Travelers Need to Do — Since Platforms Won't

The legal picture described above produces a clear practical conclusion: as a traveler booking a short-term rental, you cannot rely on the platform, the host, or the listing to verify that the air in your rental is safe. Airbnb's amenities filter lets you sort by CO alarm presence — but there is no way to verify that the detector shown in a listing photo is functional, calibrated, or within its sensor lifespan. Self-reported safety amenities on a platform that does not conduct property inspections are documentation, not protection. The only way to know the CO level in your rental is to bring a detector that shows you the actual PPM reading — not one that simply alarms at the regulatory threshold after dangerous exposure has already begun. Portable Carbon Monoxide Detector for Travel: What to Look For in 2025 A portable CO detector, charged and tested before travel, eliminates your dependence on whatever the host chose to install — or chose not to. It works in international rentals, hotel rooms, and cabins where local CO detector requirements either don't apply or aren't enforced. The 15 minutes it takes to plug one in on arrival is the only safety verification you can actually trust. Takeaway: Platform-level safety verification for short-term rentals does not exist in any meaningful form — portable protection you carry is the only reliable alternative.

Before You Book: A Vacation Rental CO Safety Checklist

• Filter Airbnb listings for 'CO alarm' in the amenities section — it reduces but does not eliminate risk.
• Check the listing for fuel-burning appliances: furnace, water heater, gas stove, fireplace. Any of these can produce CO. A listing with gas appliances and no CO alarm listed is a material risk factor.
• Bring a portable CO detector with a live PPM display. Plug it in on arrival, before unpacking. A reading above 0 in a closed rental warrants investigation before you sleep there.
• Locate windows and exits before the first night. Know how to ventilate the space quickly if needed.
• If you develop headache, nausea, or unusual fatigue that improves when you step outside, treat it as a possible CO symptom — not jetlag or travel exhaustion.
• Never use gas stoves, ovens, or outdoor grills for indoor heating. Rental guests occasionally do this in cold weather without understanding the CO risk.
• Report non-functional or missing CO detectors to both the host and the platform. Document it in writing.

The Morales case and the Montana family case share an outcome: two families in 2026, dealing with deaths or permanent injury, pursuing legal remedies against a platform arguing it isn't responsible for what happens at the properties it lists. The lawsuits may eventually change Airbnb's policies. They may not. What is certain is that this summer — rental properties with gas appliances and no required CO monitoring — presents the same risk it has every year. The AirShield™ 3-in-1 is what travelers bring when they've stopped trusting someone else's checklist. Electrochemical sensor. Live PPM display. Plug in on arrival. You'll know within minutes whether the air is clean. Check Availability →