Enter any address in Grimes County, Texas to see its FEMA flood zone
Flash flooding is the dominant flood character in Grimes County, TX, with 48 events recorded in the last 30 years. Recent examples include widespread flash flooding on May 16, 2024, associated with a derecho that also brought high winds and tornadoes, and numerous flash flood events on January 23-24, 2024, which led to flooded homes, high water rescues, and a fatality.
National Flood Insurance Program (NFIP) data shows that while Zone A areas have had the most claims (43), Zone X areas have experienced higher average payouts ($18,915) and greater average water depths (2.8 ft). Residents in areas designated as Zone A or Zone X, as well as those in areas with unknown flood risk, should pay close attention to flood potential.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
14 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Grimes County, Texas has recorded 54 flood-related events since 1996 according to NOAA's Storm Events Database, including 48 flash floods and 1 river or area floods. The county has received 27 federal disaster declarations, 7 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1993–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Hurricane Beryl | Hurricane | Jul 5, 2024 |
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Flood | Apr 26, 2024 |
| Severe Winter Storm | Severe Ice Storm | Feb 11, 2021 |
| Severe Winter Storms | Severe Ice Storm | Feb 11, 2021 |
| Tropical Storms Marco And Laura | Hurricane | Aug 23, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms And Flooding | Flood | Sep 10, 2018 |
| Hurricane Harvey | Hurricane | Aug 23, 2017 |
| Severe Storms And Flooding | Flood | May 22, 2016 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jan 24, 2024 | 0.00K |
| Flash Flood | Jan 23, 2024 | 0.00K |
| Flash Flood | May 16, 2024 | 0.00K |
| Flash Flood | Apr 30, 2021 | 0.00K |
| Flash Flood | Oct 13, 2018 | 0.00K |
| Flash Flood | Aug 27, 2017 | 0.00K |
| Tropical Storm | Aug 25, 2017 | 50.00M |
| Flash Flood | May 26, 2016 | 500.00K |
| Flash Flood | Apr 18, 2016 | 800.00K |
| Flash Flood | May 27, 2015 | 0.00K |
Flash Flood — Jan 24, 2024
A series of disturbances moved across the area resulting in numerous flash flood events that resulted in the flooding of many homes, extensive high water rescues, and a flood-related fatality.
Flash Flood — Jan 23, 2024
A series of disturbances moved across the area resulting in numerous flash flood events that resulted in the flooding of many homes, extensive high water rescues, and a flood-related fatality.
Flash Flood — May 16, 2024
On the evening of May 16, a derecho moved into SE TX. This resulted in extensive wind damage across much of the Greater Houston area, including much of Downtown Houston. Maximum wind gusts were estimated to have reached over 100 mph. Additionally, the system produced two tornadoes and widespread flash flooding. Power outages resulting from the derecho lasted multiple days for hundreds of thousa...
Flash Flood — Apr 30, 2021
Heavy rainfall produced flash flooding across portions of Walker and Grimes Counties.
Flash Flood — Oct 13, 2018
A swath of slow moving training thunderstorms produced radar-estimated 4 to near 10 inches of rain. This caused flooding across the Brazos River Valley eastward to the Trinity River.
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Grimes County, Texas:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Grimes County, Texas that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.