Rescue and recovery efforts are in high gear after a ghastly tornado left a staggering swath of destruction in Moore, Okla. With dozens of people killed, and the death toll expected to rise, many are predicting this storm will go down as one of the worst tornados on record.

President Obama signed a disaster declaration late Monday, ordering federal aid to supplement state and local recovery efforts in the area, but the relief organizations there need help now. If you would like to donate, you can make a contribution to any of the following groups.

American Red Cross

The American Red Cross has several shelters open in Oklahoma and is providing shelter, food, relief supplies and emotional support. They have also set up the Safe and Well website which allows victims to notify friends and family that they are safe. Text REDCROSS to 90999 to give $10 to American Red Cross Disaster Relief, donate online, or donate by phone at 1-800-RED CROSS.

Feeding America
Through its network of more than 200 food banks, this hunger relief organization is planning to deliver truckloads of food, water and supplies, and will also "set up additional emergency food and supply distribution sites as they are needed." You can donate online, or call 1-800-910-5524.

Operation USA
The international relief agency Operation USA is providing emergency aid to community-based health organizations and schools across Oklahoma to help recover. Donate online, by phone at 1-800-678-7255, or give by $10 by texting AID to 50555. Corporate donations of bulk quantities of disaster-appropriate supplies are also being requested; they also accept donations of United airline miles.

Salvation Army

The Salvation Army has disaster response teams on the ground and mobile feeding units have been deployed to help residents as well as rescuers. Monetary donations are the most critical thing they need at this point. A $10 donation feeds a disaster survivor for one day and a $30 donation provides one food box with basic foods for a family of four. Donate online or text STORM to 80888 to contribute $10, or make a donation by phone at 1-800-SAL-ARMY.

United Way of Central Oklahoma

The organization is seeking monetary donations for relief efforts. They note that, "Financial contributions are the best way to help unless otherwise requested." Donations can be made online at United Way of Central Oklahoma’s Disaster Relief Fund

Related on MNN:

How to help Oklahoma tornado victims
Money, supplies and even airline miles can all be donated to assist tornado victims.