US mobile carriers will be able to send emergency alerts to phones by satellite when phone masts fail, under the Mystic Alerts Act, which President Donald Trump signed on Thursday 22 October. The law is not in effect yet: the Federal Communications Commission must first write the rules, and the bill text sets a wait of at least three years after that.
The act is named after Camp Mystic, the summer camp hit by flash flooding on 4 July 2025. The floods killed more than 100 people in the Texas Hill Country, including 27 campers and counsellors at the camp and its co-executive director, the Texas Tribune reports. The bill’s sponsor puts the toll across Central and West Texas at more than 130.
Alerts failed where cell service was already thin
During the flood, the National Weather Service issued several flash flood warnings. Those are meant to trigger Wireless Emergency Alerts (WEA), the system that pushes warnings to every phone near a cell tower in the danger zone. But, the Tribune notes, cell service in the region is “notoriously spotty”, and the alerts did not reach everyone. Some people also switch the alerts off.
“Multiple reports noted undelivered WEAs throughout the areas impacted by the disaster once cellular infrastructure was damaged,” says a release from Representative August Pfluger, the Texas Republican who introduced the bill in January with Democrats Lizzie Fletcher and Marc Veasey and Republican Buddy Carter of Georgia. Senators John Cornyn and Jon Ossoff led the Senate version. Pfluger says the act means “more Americans will get the warnings they need, no matter where they live”.
“More than 130 people were tragically killed in the July 4th floods that ravaged Central Texas last year, many of whom did not receive emergency alerts due to compromised cellular networks that were knocked out by the storm,” Cornyn said in the release.
Carriers choose whether to send alerts by satellite
Satellite alerting is optional. Under the bill as introduced and as signed, the law covers carriers that already take part in WEA voluntarily and that also offer satellite voice and data service to their customers.
Within 60 days of the FCC’s rule taking effect, each of those carriers must file an election with the regulator saying whether it will send alerts by satellite. Carriers that opt in must follow the FCC’s technical standards, may not charge extra for the service, and must respect customers who have switched alerts off. Carriers that opt out must tell new and existing subscribers.
The act also shields carriers that send satellite alerts, and meet their obligations, from liability to customers over alerts that are sent or fail to arrive. Choosing not to take part is not, on its own, grounds for a claim.
The rules come first, and the clock is long
The FCC has six months from enactment, until April 2027, to propose rules and 18 months to issue a final one, in consultation with the Department of Homeland Security and the Federal Emergency Management Agency. The rules must take account of what satellites can transmit and phones can display, and keep alerting from crowding out other calls and data, including 911 calls.
The rule then takes effect on the later of two dates: 36 months after it is published in the Federal Register, or 12 months after DHS and FEMA put in place the standards needed to pass alerts to carriers. If the FCC uses its full 18 months, TSN’s reading of the text is that satellite alerts would not be required until spring 2031 at the earliest.
Texas has acted separately. State legislators now require flood-prone counties hit by the disaster to install outdoor warning sirens, a process the Tribune says is ongoing.
Satellite-to-phone networks are already arriving
The law lands as direct-to-phone satellite service reaches the market. The FCC this month cleared Globalstar’s C-3 system to connect straight to smartphones, and SpaceX is hunting for US cell sites for Starlink Mobile, which already reaches millions of VEON customers.
Optional satellite alerting leaves carriers in charge
The law ties emergency alerts to that new infrastructure without forcing anyone onto it, and that optional design is its weak spot. A carrier with no satellite service is outside the law entirely, and one with satellite service can decline, provided it tells customers. Pfluger’s promise that more Americans will get warnings “no matter where they live” depends on carrier choices that will not be made until the rule takes effect.
The long timetable cuts both ways. Leaving room for DHS and FEMA standards means alerts should arrive in a tested format rather than an improvised one. It also means Hill Country communities wait years for a fix to a problem they lived through in 2025. Better forecasting, such as AI lightning warnings that stretch to three hours, only helps if the warning reaches a phone; it is the gap our tech for good roundup keeps returning to.
The first test comes in April 2027, when the FCC’s proposed rules are due.
Sources
- Rep. August Pfluger, “SIGNED INTO LAW: Pfluger’s Mystic Alerts Act”
- H.R. 7022, Mystic Alerts Act, enrolled bill text (US Government Publishing Office)
- H.R. 7022 as introduced, 12 January 2026 (US Government Publishing Office)
- Texas Tribune, “Emergency weather alerts may be sent via satellite under new ‘Mystic Alerts Act'”, Emily Foxhall, 23 October 2026
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