NEW YORK (CNN/Money) - There truly is no rest for the weary on the Gulf Coast, nor for the aid organizations that have been providing life-saving assistance for them over the past month.

As Hurricane Rita re-floods parts of New Orleans and threatens to take out towns in Texas and other parts of Louisiana this weekend, relief organizations that have been providing food, shelter, medical and financial assistance to the million-plus Katrina evacuees now also are gearing up for disaster recovery for new hurricane victims.

"We have a long way to go in our fundraising to meet the needs of people from Katrina, let alone what we need to do for the people of Rita," said Joe Becker, senior vice president of preparedness and response for the American Red Cross in a statement Friday.

Here's a look at some of what FEMA, the Red Cross and the Salvation Army are preparing for Rita survivors as well as an update on what they've done for Katrina survivors and the cash assistance they've given out.

The Federal Emergency Management Agency has at the ready 45 truckloads of water, and ice as well as 25 truckloads of meals in Texas to assist Hurricane Rita survivors and evacuees. It also has 140 truckloads of water,120 truckloads of ice, and 73 truckloads of meals in Louisiana.

"There is a lot more in the pipeline on the way" said FEMA acting director R. David Paulison in a press conference Friday afternoon. But right now, he said, FEMA has enough supplies on the ground to provide four days of relief post-Rita.

It also has deployed 400 medical personnel and 17 urban-search-and-rescue teams to Texas. Plus, there are more than 400 Coast Guard personnel, as well as 50,000 active-duty and National Guard troops on the ground.

Rita evacuees will be entitled to apply for the same assistance provided to all disaster survivors via FEMA and other federal, state and local aid agencies, including unemployment benefits and cash grants up to $26,200 to help with housing and medical matters among others. (See here the full list of assistance measures on offer.)

But it's not clear yet whether Rita survivors will be granted up to $2,000 emergency cash assistance the way Katrina evacuees were, said FEMA spokeswoman Kathy Cable.

To date, FEMA has approved close to $1.6 billion in emergency cash assistance to 748,020 households displaced by Katrina from Louisiana, Mississippi and Alabama.

If you want to donate money to hurricane-relief efforts, click here for a list of the major funds and humanitarian organizations devoted to the task.

The Red Cross, the nation's first emergency responder, has set up 122 shelters so far right outside the areas expected to be hit by Rita – 68 of which are already open and 54 of which are on standby.

On Thursday night, the shelters housed 17,000 Rita evacuees. Friday night, 100,000 are expected.

The Red Cross also will be prepared to deliver up to 750,000 meals per day the day after Rita makes landfall.

It estimates the total cost for its Katrina emergency relief, which will be ongoing for the foreseeable future, will exceed $2 billion. To date, it has received nearly $854 million in pledges, of which it has given out $438 million in cash assistance to 448,000 households so far.

For Katrina evacuees in need of cash assistance who haven't registered with the organization, the Red Cross has set up a toll-free number (1-800-975-7585), with operators available 24 hours a day. It is giving out between $360 to just over $1,500, depending on household size.

Besides cash assistance, the more than 156,000 Red Cross volunteers have served over 12 million hot meals and 9 million snacks. They've provided over 2.4 million overnight stays in shelters across the country. And the organization has provided crisis counseling to more than 344,000 evacuees.

Going forward, more volunteers will be needed as will more cash and blood donations.

"The donations we're receiving are being spent as they come in. There is no stockpile," said Red Cross spokeswoman Amanda Mark.

To donate to the Red Cross, you can do so online at www.redcross.org or you can call 1-800-HELP-NOW (1-800-435-7669).

Since Aug. 29 -- the day Katrina struck -- the Salvation Army has dedicated 24,000 volunteers, 2,346 Salvation Army officers and 5,000 employees to hurricane-relief efforts.

Together they've logged 286,076 hours of work helping Katrina and now Rita evacuees.

In response to Rita, the Salvation Army expects to serve up to 560,000 hot meals per day from shelters and its mobile canteens. It is deploying more mobile rescue units and staff to the Texas and neighboring states to help Rita survivors.

To date the Salvation Army has received $168 million in donations for Katrina relief as well as general disaster relief. It is creating a new Hurricane Relief Fund to donors who wish their money to be spent on either Katrina or Rita relief, said spokeswoman Melissa Temme.

"The Salvation Army is preparing to respond to two of the largest natural disasters in our nation's history, simultaneously," said Major George Hood, national community relations and development secretary in a statement. "Our sole focus is to ensure that our resources are safe and in place to meet the immediate needs of people affected by Rita, and to ensure that our care for Katrina survivors continues unimpeded."

Since it is coordinating its long-term relief efforts with FEMA so as not to duplicate government aid, the Salvation Army cannot yet estimate what will be the total cost for the organization's Katrina relief efforts. But it does estimate that it will be providing relief to Katrina survivors for up to three years, Temme said.

To donate to the Salvation Army, you can do so online at www.1800SALARMY.com or you can call 1-800-SAL-ARMY (1-800-725-2769).