Best Flood Warning Apps

250+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated July 2026

Whether you're new to flood warning or looking for an upgrade, our curated collection of 250+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Flood Warning Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Flood Alert WatcherFlood Alert WatcherFree4.8★ (5)YesYesJul 2026
2Rivercast: River Levels USARivercast: River Levels USAFree4.7★ (11K)YesYesAug 2026
3Emergency: Severe Weather AppEmergency: Severe Weather AppFree4.8★ (7.2K)NoNoAug 2026
4Storm ShieldStorm ShieldFree4.8★ (111K)YesYesAug 2026
5Watch Duty: Wildfire & FloodsWatch Duty: Wildfire & FloodsFree4.9★ (46K)NoYesAug 2026
6AIoT - Based Flood WarningAIoT - Based Flood WarningFreeNoNoJul 2026
7King County Flood WarningKing County Flood WarningFree3.7★ (3)NoNoMay 2026
8Clime: NOAA Weather Radar LiveClime: NOAA Weather Radar LiveFree4.5★ (1M)YesYesAug 2026

Top Picks for Flood Warning

Flood Alert Watcher#1

Flood Alert Watcher by John Benson

Flood Alerts & Warnings
Editor's Choice
☀️ Weather
4.8(5 ratings)
FreeAdsIn-App Purchases
Flood Alert Watcher screenshot 1
Flood Alert Watcher screenshot 2
Flood Alert Watcher screenshot 3
Flood Alert Watcher screenshot 4
Flood Alert Watcher screenshot 5
Flood Alert Watcher screenshot 6

Receive real-time flood alerts and weather warnings for the UK. View interactive flood maps, understand warning levels, and get peace of mind with trusted data from the Environment Agency.

Rivercast: River Levels USA#2

Rivercast: River Levels USA by Juggernaut Technology, Inc.

NOAA Forecasts & Flood Alerts
Strong Contender
☀️ Weather
4.7😊(11K ratings)
FreeAdsIn-App Purchases
#97in Weather
Rivercast: River Levels USA screenshot 1
Rivercast: River Levels USA screenshot 2
Rivercast: River Levels USA screenshot 3
Rivercast: River Levels USA screenshot 4
Rivercast: River Levels USA screenshot 5
Rivercast: River Levels USA screenshot 6

Monitor river levels, flow rates, and flood warnings with real-time data and forecasts. Get custom alerts for your favorite waterways and visualize trends with interactive graphs. Essential for anyone living, working, or recreating near water.

What We Love

  • 🚀 Great app
  • 👍 Easy to navigate
  • 👍 Helpful for monitoring river levels
  • 👍 Useful for fishing and boating

Room to Improve

  • 🐛 Data not always up-to-date
  • 🔒 Paid subscription required for full functionality
  • 🔒 Can't view more than 30 hours of data without premium
Emergency: Severe Weather App#3

Emergency: Severe Weather App by American Red Cross

Alerts, Maps, Radar & Shelters
Worth Considering
☀️ Weather
4.8😐(7.2K ratings)
Free
#87in Weather
Emergency: Severe Weather App screenshot 1
Emergency: Severe Weather App screenshot 2
Emergency: Severe Weather App screenshot 3
Emergency: Severe Weather App screenshot 4
Emergency: Severe Weather App screenshot 5
Emergency: Severe Weather App screenshot 6

Stay safe during extreme weather and disasters with real-time alerts, interactive preparedness guides, and essential tools. This app provides official weather notifications, live maps, and helps locate shelters and services when you need them most.

What We Love

  • 👍 Easy user interface
  • 👍 Accessible to the blind
  • 🚀 Sends immediate notifications
  • 👍 Keeps users informed about hazards

Room to Improve

  • 🔇 Notifications too loud even with volume down
  • 🔁 Repeated notifications for the same event
  • 🗺️ Inaccurate location tracking and alerts

More Flood Warning apps to explore

4
Storm Shield
Storm Shield
Storm Shield
Severe Weather Alerts & Radar
Free

Receive precise, location-based severe weather alerts for tornadoes, hurricanes, floods, and more. Get voice and push notifications, view radar maps, and access forecasts. Optional premium features offer advanced radar imagery and lightning alerts.

Location-based severe weather alertsVoice and push notificationsHi-Def radar map
☀️ Weather
(111K)
free with in-app purchases
5
Watch Duty: Wildfire & Floods
Watch Duty: Wildfire & Floods
Watch Duty: Wildfire & Floods
Fire & Flood Maps and Alerts
Free

Get real-time wildfire information and alerts powered by a dedicated team of first responders and reporters. Receive immediate updates on fire perimeters, evacuation orders, and firefighting efforts, going beyond delayed government alerts to keep you informed and safe.

Real-time wildfire mapsPush notifications for nearby firesActive fire perimeters
📡 News
(46K)
free with in-app purchases
6
AIoT - Based Flood Warning
AIoT - Based Flood Warning
AIoT - Based Flood Warning
AIoT-Flood Warning System_DATS
Free
☀️ Weather
(0)
7
King County Flood Warning
King County Flood Warning
King County Flood Warning
by County of King
Free

Receive real-time flood information for key rivers and creeks in King County. Track current river flows, flood stages, and forecasts to stay informed about potential hazards in your area.

Real-time flooding informationRiver flow and flood stage dataFlood forecasts
☀️ Weather
(3)
free
8
Clime: NOAA Weather Radar Live
Clime: NOAA Weather Radar Live
Clime: NOAA Weather Radar Live
Tornado, Rain & Storm Alerts
Free

Get real-time radar, severe weather alerts, and accurate forecasts. This app provides detailed weather information, including precipitation, temperature, and wind, to help you stay informed and safe from approaching storms.

Real-time radar imagesSevere weather alertsPrecipitation forecast
☀️ Weather
(1M)
free with in-app purchases
9
My Flood Risk
My Flood Risk
My Flood Risk
by HKV Lijn in Water B.V.
Free
📚 Education
(0)
10
PegelAlarm: Flood & Rain alert
PegelAlarm: Flood & Rain alert
PegelAlarm: Flood & Rain alert
Water Level & Emergency alarm
Free

This app provides real-time water levels and forecasts from over 30,000 measuring points worldwide. It alerts users to critical water levels, helping them prepare for potential floods and other water-related emergencies.

Real-time water level monitoringFlood and emergency alertsCustomizable warning thresholds
☀️ Weather
(0)
free with in-app purchases
11
Future Flood Predictor
Future Flood Predictor
Future Flood Predictor
Real-time flood prediction
Free

This application provides real-time, localized flood risk assessments using data from NASA satellites and weather stations. It offers instant risk level indicators and critical alerts to help users stay informed and safe during changing weather conditions.

Real-time flood risk levelsNASA-powered data accuracyCritical flood alerts
☀️ Weather
(1)
free
12
FloodWatch
FloodWatch
FloodWatch
Real-time river and flood data
Free

Monitor real-time river and flood data across the United States. Track river height, discharge, precipitation, and water temperature with data from USGS and NWS. Ideal for property owners, outdoor enthusiasts, and anyone needing flood awareness.

Real-time river dataHistorical trends and graphsFavorites list for gauges
☀️ Weather
(280)
free with in-app purchases
13
National Flood Association App
National Flood Association App
National Flood Association App
by National Flood Determination Association
Free
💼 Business
(0)
14
Flood Map USA
Flood Map USA
Flood Map USA
Flood zone maps by address
Free

This app helps you identify flood-prone areas near a specific U.S. street address. It can generate printable maps or interactive overlays based on available FEMA flood study data. Useful for risk assessment before or after severe weather events.

Flood zone identification by addressFEMA flood study data integrationPrintable PDF flood maps
☀️ Weather
(1)
ad-supported
15
Flood Report
Flood Report
Flood Report
by Matt Shapiro
Free
☀️ Weather
(0)
16
RiverAware
RiverAware
RiverAware
Monitor River Levels & Floods
Free

Access real-time river levels, flood alerts, and accurate forecasts from over 13,000 stations nationwide. Monitor your favorite rivers, receive custom notifications, and stay informed with severe weather news.

Real-time river and coastal station dataInteractive map with color-coded pinsUp to 3 months of water-level history
☀️ Weather
(8)
freemium
17
HydraAtlas
HydraAtlas
HydraAtlas
Flood Awareness and Safety
Free

This app provides detailed flood risk information for any US location using official FEMA data. It offers real-time updates on stream gauges, weather alerts, and radar, helping users make informed decisions about potential flood hazards.

FEMA flood zone mappingUSGS stream gauge readingsNational Weather Service alerts
🔧 Utilities
(2)
free
18
MD Weather Alerts
MD Weather Alerts
MD Weather Alerts
Maryland weather & community
Free
☀️ Weather
(0)
19
Japan Alerts
Japan Alerts
Japan Alerts
Earthquake, tsunami & volcano
Free

Receive real-time alerts for earthquakes, tsunamis, volcanoes, and typhoons directly from Japan's official meteorological agency. Features include S-wave countdowns, municipality-level evacuation orders, and multi-language support for essential information.

Real-time earthquake, tsunami, volcano, and typhoon alertsS-wave countdown for shaking arrivalMunicipality-level evacuation orders
☀️ Weather
(13)
free with in-app purchases
20
American Flood Coalition
American Flood Coalition
American Flood Coalition
by American Flood Coalition, Inc.
Free
💼 Business
(0)

FAQ about Flood Warning

What are the best flood warning apps for iPhone?
Flood Alert Watcher tops our flood warning apps ranking as of July 2026, with a 4.8-star average from 5 App Store ratings, and it's free to download.
Yes — 20 of the top flood warning apps we rank are free to download, including Flood Alert Watcher and Rivercast: River Levels USA.
Flood Alert Watcher shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 250+ flood warning apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Flood Alert Watcher provides real-time flood alerts and weather warnings for the UK. It features interactive maps and data directly from the Environment Agency to keep users informed about potential flood risks.
Flood Alert Watcher uses three warning levels: Alert, Warning, and Severe. The app displays the number of active alerts for each level and allows users to tap for detailed information.

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