After nearly 18 inches of rain led to deadly flooding in south central Texas, American Red Cross workers opened 13 shelters on Monday.

More than 430 people spent the night at the shelters, according to the organization.

Now the Red Cross and other charities need the public’s help, said Brad Kieserman, vice president of Disaster Services Operations and Logistics for the Red Cross.

A flash flood watch will remain in effect for eastern parts of south central Texas through 1 p.m. central time.

“The Red Cross, people in Houston and all those affected by disasters across the country need the public’s support right now,” Kieserman said.

The Weather Channel listed several ways Atlanta residents and those elsewhere can lend that help and reach their loved ones.

To give money:

Donations are accepted in any amount on the Red Cross website, or you can text REDCROSS to 90999 to give $10. The Red Cross also accepts donations by mail, or you can call 1-800-RED-CROSS to discuss other options.

The Salvation Army is also taking donations to help flood victims.

To volunteer:

If you're visiting Texas and would like to give more than just money, the Red Cross is also looking for volunteers. To apply for a volunteer role in the recovery efforts, go to Houston's Red Cross website.

To find help:

If you need help locating a family member, or to list yourself as safe, check the Red Cross's "Safe and Well" page.