American Red Cross — The organization has shelters open and is shipping truckloads of supplies for distribution. Volunteers are also in place.

Salvation Army —It is deploying 42 mobile kitchens — each of which can serve an average of 1,500 meals per day — to staging areas in Dallas and San Antonio. It also will distribute supplies of water, cleanup kits, food and shelter supplies.

United Way — United Way of Greater Houston has established a Flood Relief Fund. Donations will be used to help with both immediate, basic needs and long-term recovery services such as case management and minor home repair.

​​​​​​Houston Food Bank — Donations to the Houston Food Bank provide meals in emergencies and throughout the year.

San Antonio Food Bank — It is collecting monetary donations, along with nonperishable goods and supplies like water, baby food, diapers, flashlights and new batteries.