South Texas heat and humidity can keep wet materials risky after surface water leaves.
Texas storm event detail
2018 Great June Flood of the Rio Grande Valley
A source-backed event detail page for 2018 Great June Flood of the Rio Grande Valley, including what happened, affected regions, water patterns, property impacts, cleanup lessons, documentation reminders, official resources, and related Texas recovery guides.
Direct answerSource-backed
Quick Answer
2018 Great June Flood of the Rio Grande Valley affected Rio Grande Valley, Deep South Texas, Coastal Bend and is best understood as a slow-moving tropical moisture and urban flooding event. For cleanup planning, focus on safety, official instructions, documentation before cleanup when safe, source-of-water details, and whether the property damage involved flat drainage flooding, urban ponding, tropical rain bands, standing water.
What happened
The Great June Flood of 2018 made the Rio Grande Valley a central part of the Texas flood archive. NWS Brownsville describes widespread impacts from repeated heavy rain over a flat, highly developed, drainage-sensitive region.
Rio Grande ValleySouth TexasGreat June Floodurban drainage
Timeline facts
Event sequence
- A disorganized tropical moisture setup produced days of heavy rainfall over the Rio Grande Valley.
- Urban drainage, low-lying neighborhoods, and commercial properties were affected across multiple cities.
- The event became a South Texas reminder that serious flooding does not require a named hurricane.
Texas footprint
Regions affected
- Rio Grande Valley
- Deep South Texas
- Coastal Bend
- McAllen
- Weslaco
- Harlingen
- Brownsville
- Hidalgo County
- Cameron County
Source clues
Water patterns
- flat drainage flooding
- urban ponding
- tropical rain bands
- standing water
- humid drying
Damage context
Property impacts
- stucco homes
- slab homes
- rental properties
- small businesses
- schools
- retail spaces
Safety Warning
Do not enter a flooded building if you see structural damage, standing water near electrical systems, a gas smell, sewage contamination, chemical contamination, or unstable floors or walls. If conditions are unsafe, wait for emergency, utility, local, or qualified restoration professionals.
Archive use note
Use the event name as context, not as the whole damage explanation.
An event page can help identify regional patterns, but the cleanup record still needs the property-level facts: city, county, water source, timing, rooms affected, safety flags, photos, receipts, and official links checked.
Cleanup lessons
What this event teaches about Texas recovery
Flat drainage areas should document exterior ponding and how water reached the building.
Renters and landlords need separate belongings, building, notice, and repair records.
Documentation reminders
What to keep in the damage packet
Photograph exterior drainage, curb water, thresholds, flooring, baseboards, and contents.
Record whether water entered from drainage, roof, door, garage, plumbing, or appliances.
Save local emergency, school, workplace, and landlord communications.
Tell Us What Happened
Describe the property city, water source, standing water, sewage, electricity concerns, visible mold, property type, and insurance status. Approximate answers are okay. The goal is to understand the water source, timing, safety concerns, and property type.
Share the basics in writing and keep documenting the damage if it is safe.
Official resources
Primary links for this event
FAQ
What should I do first after floodwater enters a Texas home or business?
Start with safety. Stay out if there is standing water near electricity, structural damage, gas odor, sewage, chemical contamination, unstable flooring, or local warnings. If it is safe to enter, document damage with photos and video before moving items, then begin water removal and drying or start a live chat to describe the damage.
Does homeowners insurance cover flood cleanup in Texas?
Coverage depends on the policy and the source of water. Texas Department of Insurance guidance says standard home policies generally do not cover flood damage from rising water and that flood insurance is separate. Sudden accidental plumbing water, roof-openings from covered wind damage, sewer backups, and mold may be handled differently depending on endorsements and exclusions.
How quickly can mold become a concern after flooding?
Mold risk can develop quickly when wet materials remain damp, especially in Texas humidity. The practical goal is to remove standing water, expose wet materials, reduce indoor humidity, and verify drying as soon as conditions are safe. No site can guarantee mold prevention, especially after contaminated water or delayed drying.
Is sewage backup cleanup safe to do myself?
Sewage and black water can contain pathogens and other contaminants. Avoid contact, keep children and pets away, and do not use electrical equipment in wet contaminated areas. Large or contaminated losses usually require professional cleanup, controlled removal, cleaning, disinfection, drying, and documentation.
Can cleanup start before an insurance adjuster sees the property?
You should follow your policy, adjuster, FEMA, TDEM, and local instructions, but many official recovery resources emphasize documenting damage and taking reasonable steps to prevent additional damage when it is safe. Take photos and videos first, keep samples or lists when requested, separate damaged and undamaged items, and save receipts.
Last Updated
Source Library
- National Weather Service: Flooding in Texas
- Texas Division of Emergency Management: Disasters
- Federal Emergency Management Agency: How to Document Damages After Severe Weather Events
- National Flood Insurance Program / FloodSmart: Recovering Financially After a Flood
- Texas Department of Insurance: Flood Insurance
- TexasFlood.org: Recovery
Use the event context carefully
Describe the property-level damage before cleanup decisions get rushed.
Include event name if relevant, but also include water source, timing, city, county, rooms affected, sewage, electricity concern, visible mold, insurance status, and official links checked.