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Emergency Alert Failures
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Grid-Independent · IPAWS-Integrated

Centralized Emergency Alert Systems Are Failing. Curbside Protection Is Here.

SignalPost transforms the most common piece of neighborhood infrastructure into curbside climate adaptation — delivering verified emergency alerts where sirens, cell towers, and smartphones can't reach.

When sirens fail to activate, SignalPost brings the emergency alert to the curb. Solar-powered, grid-independent, and IPAWS-integrated.

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Visible 500ft+
SignalPost SmartMailbox with red LED alert activated at dusk in suburban neighborhood
Solar-powered
72h+
Battery Backup
500ft
Visibility
0
Grid Dependency
<10s
Alert Delivery
The Problem
Why current systems fall short.

Outdoor emergency alert sirens are aging, fail to activate, are easy to miss indoors, and don't trigger action. For small towns with shrinking budgets and growing climate risk, the math doesn't work — and the gap keeps widening.

🏠

Sirens weren't designed to reach you indoors.

Outdoor sirens lose up to half their reach during storms — and modern insulated homes block what's left.

🔌

Most systems fail when the grid goes down.

When power goes out, every smart device, phone charger, and Wi-Fi router goes silent — taking your alerts with them.

💸

Too expensive to replace — or add more.

A single siren replacement runs $30K–$100K, and 70% of outdoor sirens in the U.S. are past their useful life.

The Solution
Transforming the Curb into a Lifeline.
We've turned the most stagnant neighborhood infrastructure — the mailbox — into a smart, solar-powered emergency node.
⚡

Grid-Independent

100% solar-powered with battery backup — no wiring, no electrician, no outlet required.

📡

IPAWS Integrated

Receives encrypted, verified emergency alerts via LTE-M cellular — geofenced to your exact location.

🔊

Voice Guidance

Clear voice instructions tell you what's happening and what to do — not just a vague siren wail.

🚨

Visual Beacon

360° LED system visible from 500+ feet — alerts neighbors and guides responders even in low visibility.

SignalPost SmartMailbox
How It Works
Three layers of protection. Zero grid dependency.
🌤️

Charges Itself

An integrated solar panel and battery provide extended autonomous operation — no wiring, no electrician, no outlet.

📨

Receives Geofenced Alerts

An LTE-M modem receives encrypted IPAWS alerts — tornado warnings, flood alerts, evacuation orders — in seconds.

🚨

Creates Unmissable Awareness

The LED halo activates — visible from 500+ feet — while a speaker broadcasts clear voice instructions.

For Property Owners & HOAs
No Construction Required.
It still serves its basic utility as a mailbox — with upgraded curb appeal. SignalPost is designed for rapid, frictionless deployment with flexible subscription tiers to fit any budget.
🚧

Zero Trenching

Installs on any existing curbside mailbox post — completely self-contained, solar-powered, and still delivers your mail.

⚡

Instant Activation

Deploy a neighborhood-wide alert network in a single afternoon — each unit is pre-configured and connects automatically.

🔄

Flexible Subscription Tiers

From essential alerts to premium intelligence — every tier includes LTE data, software updates, and hardware maintenance.

✨

Upgraded curb appeal — not an eyesore.

Sleek, modern design that looks like a deliberate upgrade. Clean lines, premium finish, and an LED halo that doubles as ambient path lighting after dark.

Who We Protect
Real problems. Real people.
Every year, failures in emergency alerts cost lives. SignalPost addresses the pain points that matter most — for families and for the agencies that protect them.
📱

"My phone was dead when the tornado hit."

When power goes out, phones die within hours. 32 million U.S. households experienced an outage in 2024. Every smart doorbell, every voice assistant, every phone-based alert — gone when you need them most. SignalPost runs on solar and stays on when everything else goes dark.

🔇

"I heard a siren but had no idea what it meant."

70% of outdoor warning sirens in the U.S. are past their useful life. They produce a single tone — no voice, no specificity, no way to know if the danger is for your street or the next county. Distant, vague, and easy to ignore. SignalPost is right at your curb — visible, specific, and unmissable.

👴

"My parents don't have smartphones."

44 million Americans live in areas without reliable emergency alert coverage. Elderly residents, rural households, and non-English speakers are the most vulnerable — and the least reached by current systems.

🚨

"We can't afford to replace our sirens — let alone add more."

A single municipal siren replacement runs $30K–$100K. For small rural towns with shrinking budgets, that's an impossible line item. SignalPost transforms infrastructure that already exists — the curbside mailbox — into an alert node at a fraction of the cost. No new towers. No construction.

📋

"When the grid goes down, our entire alert system goes with it."

When a major storm knocks out power for millions, every grid-dependent communication channel fails simultaneously. SignalPost operates independently on solar — and because residents purchase and install their own units, the city gains a distributed alert network without capital expenditure.

🗺️

"Our alerts cover the county, not the neighborhood."

County-wide alerts create alert fatigue — residents learn to ignore warnings because they're rarely specific to their location. SignalPost sits at the curb of every home it protects — hyperlocal, visible from 500+ feet, with clear voice instructions. That specificity drives action.

Alert Type Estimated Action Rate
Smartphone WEA notification~12%
Municipal siren (audio only, no voice)~25%
SignalPost (visual + voice + hyperlocal)70%

The difference: A siren tells your county there's danger. SignalPost tells your household what the danger is, what to do, and confirms with a visual signal that this alert is for you. Right at your curb. Unmissable.

The Evidence
When alerts fail, people are left without warning.
These are real failures from the last 18 months that a curbside, grid-independent alert system is designed to prevent.
Tornado · Siren Failure

Tornado Sirens Failed to Activate — Despite Being Tested the Day Before

During a May 2025 EF-3 tornado outbreak, a city's entire siren system failed to sound. Residents received no text alerts. The sirens had been tested successfully just 24 hours earlier — yet when the real threat arrived, the system went silent. A SignalPost SmartMailbox at the curb doesn't depend on someone activating it. It receives encrypted, verified IPAWS alerts directly and responds in seconds — automatically, visibly, audibly.

Grist · Center for Disaster Philanthropy May 2025
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Hurricane · Grid Failure

Hurricane Helene: Millions Without Power, Every Grid-Dependent Alert Went Dark

In 2024, U.S. electricity customers experienced an average of 11 hours of interruptions — nearly double the prior decade. Three hurricanes accounted for 80% of all outage hours. When the grid fails, every smart device, phone charger, and Wi-Fi router goes silent. A solar-powered SmartMailbox at the curb stays on — broadcasting alerts with light and voice while the rest of the neighborhood is dark.

U.S. Energy Information Administration 2024
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Infrastructure · Communication Failure

Hurricane Beryl: Millions Lost Power, Utility Communication Collapsed

When Hurricane Beryl struck Texas in July 2024, nearly 3 million people lost power. The utility provider faced widespread criticism for delayed communication — some areas went over a week without electricity and without clear information. Sirens are useless without power. Phone alerts are useless without a charged phone. A SignalPost SmartMailbox at the curb runs on solar, activates automatically, and delivers clear voice instructions the moment an IPAWS alert is issued for your location.

Campus Safety Magazine Jul 2024
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By the Numbers
The scale of the crisis — and a simple solution already at the curb.
~50M
U.S. curbside mailboxes — each one a potential SignalPost node
44M
Americans in "alert deserts" with no outdoor warning coverage
70%
Of outdoor sirens past their useful life — aging out faster than replacements
80%
Of major power outages caused by weather — exactly when alerts matter most
Get Started
Bring SignalPost to your community.
Whether you're a homeowner, HOA board member, or emergency manager — get in touch and we'll build a deployment plan for your neighborhood.

No spam. No credit card. We'll follow up within 48 hours.