How Street Flooding Is Designed to Work in Katy Neighborhoods

HCMUD 0712026-08-26T14:38:25-05:00August 26, 2026|

During heavy rainfall, it can be concerning to see water collecting along neighborhood streets. While street flooding should always be taken seriously, some temporary ponding on streets is an intentional part of how many drainage systems are designed to function in Southeast Texas. In Katy-area neighborhoods, streets often serve as part of the stormwater management system during intense rainfall events.

Neighborhood drainage systems are designed to move stormwater away from homes and into storm drains, underground pipes, channels, and detention ponds. During normal rain, water flows along curbs and gutters into storm inlets. During heavier storms, rainfall may fall faster than the system can immediately carry it away. When that happens, streets may temporarily hold water until the storm drains and detention systems can move it downstream.

This temporary storage on the streets helps reduce the risk of water reaching homes and other structures. Streets are typically designed at lower elevations than building foundations, which allows water to collect on the roadway before it threatens homes and other buildings.

Detention ponds also play an important role. These ponds collect stormwater from streets, storm drains, and drainage channels, then release it slowly over time. This controlled release helps reduce downstream flooding and prevents too much water from entering the larger drainage systems all at once.

It is important to understand the difference between designed street ponding and dangerous flooding.

Temporary water in the street during heavy rainfall can be expected, but water that rises toward homes, is moving rapidly, or enters buildings could be a sign of dangerous flooding. Residents should never drive through flooded roadways, even if the water appears shallow. Moving water can be difficult to judge and may hide curbs, debris, or pavement damage.

Residents can help the drainage system function as intended by keeping storm drains and street gutters clear of trash, leaves, grass clippings, and other debris. Trash cans should also be returned to their storage location after pickup, especially when heavy rain is expected, because bins can wash into streets and block drains, increasing the risk of potential flooding.

Maintenance of the drainage system within and around HCMUD 71 is shared between the District, neighborhood homeowners associations, Harris County, and Harris County Flood Control District.

• Harris County maintains the streets and associated storm sewer drains and pipes. For concerns about street or storm sewer flooding or maintenance issues, please contact Harris County Precinct 4’s constituent support department, at (832) 927-4444, or service@hcp4.net.
• HCMUD 71 maintains detention ponds within the District, with some maintained in partnership with the neighborhood’s homeowners association. For concerns related to detention pond maintenance, please contact HCMUD 71’s operator, Regional Water Corporation, at (281) 897-9100.
• Harris County Flood Control District (HCFCD) maintains multiple regional drainage channels within the District, including South Mayde Creek. For concerns related to HCFCD channels, please contact HCFCD’s service request center, at (346) 286-4197.

Street ponding during heavy rain can be inconvenient, but in many cases it is part of a larger system designed to protect homes and other buildings and manage stormwater safely. By understanding how the system works and helping keep drainage paths clear, residents can better recognize what is normal during storms and when a concern should be reported.

Tornado Watch vs. Warning – How to Respond Safely

HCMUD 0712026-08-19T11:17:07-05:00August 19, 2026|

While hurricanes tend to dominate the headlines, tornadoes sometimes pose a serious threat in Southeast Texas, including in the Katy area. As spring and summer bring more frequent storms, alerts and warnings related to tornado activity become more common.

Understanding the difference between a Tornado Watch and a Tornado Warning, and knowing how to respond to each, can help keep your family safe when weather conditions escalate.

In any severe weather situation, it’s critical to have multiple ways to receive alerts. HCMUD 71 encourages residents to:

• Sign up for HCMUD 71 notifications at: https://hcmud71.com/sign-up-for-email-or-text-message-alerts/#alerts;
• Sign up for emergency notifications through ReadyHarris at www.readyharris.org to get real-time updates specific to your location; and
• Monitor Local TV and radio stations, weather radios, and smartphone alert systems.

Tornadoes in the Katy area can form quickly, often with little notice, and may occur as part of a larger weather system or as a spin-off from tropical storms or hurricanes. Tornado activity peaks from April to June, but can occur at any time.

A key to staying safe is knowing how to understand the difference between a Tornado Watch and a Tornado Warning.

A Tornado Watch means that a tornado may form due to weather conditions favorable for tornado development. This is the time to stay weather-aware, check your emergency kit, and ensure you’re ready to take shelter quickly if needed. You do not need to seek immediate shelter during a Tornado Watch, but you should be prepared to act quickly if the alert escalates.

A Tornado Warning, on the other hand, means a tornado has been spotted or detected by radar in your area. When a Tornado Warning is issued, take shelter immediately. Do not wait to see the tornado or confirm the danger yourself.

Seek cover in the lowest, most interior room of your home, preferably away from windows. A hallway, bathroom, or closet on the first floor is often the safest option. If you live in a multi-story home, move to the ground level. Mobile homes and vehicles may be unsafe; if you’re in one, relocate to a sturdy building or designated storm shelter if time allows and it is safe to do so.

HCMUD 71 recommends that residents take time to review and update their family’s emergency plan before the next storm hits. Residents should:

• Know where to shelter;
• Have flashlights and backup batteries available;
• Maintain emergency food, medicine, and water supplies;
• Keep important documents in a safe, accessible place; and
• Secure outdoor items, such as furniture and trash bins.

Tornadoes are unpredictable, but being informed and prepared can make all the difference. HCMUD 71 encourages all residents to stay alert during severe weather events and to act quickly when tornado warnings are issued. As always, in the event of an emergency, call 911.

Sign Up for HCMUD 71 Email and Text Alerts

To Sign Up for Email Alerts:

• Visit https://hcmud71.com/sign-up-for-email-or-text-message-alerts/#alerts
• Scroll to the Email Alerts section.
• Enter your email address and name.
• Select your preference:
  • Emergency Notifications Only
  • Emergency and Non-Emergency Notifications
• Click Subscribe.

To Sign Up for Text Alerts:

• Open a text message on your mobile phone.
• Text MUD71 to (832) 344-3195.
• Follow the instructions in the reply message to complete your sign-up.

Text alerts include emergency notices and important service updates. Standard messaging rates may apply depending on your carrier.

Register with ReadyHarris for Regional Alerts

To Register for ReadyHarris Regional Alerts:

• Go to www.readyharris.org
• Click “Sign Up for Alerts”
• Choose your language preference and fill out the form to create a new account, including providing your name, username and password, location information, and contact preferences.
• Accept the Terms of Use and click Create Account.
• Confirm your profile and location details and add any additional contact information if needed.
• Finish registration.