The American Red Cross is encouraging people to donate money on its website or to text 90999 to donate $10. The organization is also asking for volunteers.
Red Cross is also seeking blood donations. Texas organization Carter BloodCare and South Texas Blood and Tissue Center are also seeking blood donations.
Americares, an emergency response organization based in Connecticut, is delivering relief supplies and working with a local clinic in Houston. They are taking donations here.
Crowdfunding site Global Giving is attempting to raise $2 million for funds that will "exclusively support local relief and recovery efforts from this storm."
Airbnb has launched a site for people looking for a place to stay and for those who can offer shelter. Fees are waived for people who check in before September 1.
United Way of Greater Houston has set up a relief fund that people can donate to. The organization said its first priority is shelter and basic needs like food. The organization said it will also focus on long-term recovery efforts.
Pets affected by Hurricane Harvey are being taken in by animal shelters across Texas, including the SPCA of Texas, Austin Pets Alive and the San Antonio Humane Society. The Houston Humane Society is also available, with limited staff.
Other organizations that are accepting donations for disaster relief include the Texas Diaper Bank, Discoll Children's Hospital in Corpus Christi and the Salvation Army.