I am part of a group called Proactive Bengalis, a organization that is based out the DC-Metro area with members all over the US.
(link to the Proactive Bengalis website)
They are sponsoring a flood relief drive. Donations will be sent to Professors in BUET who have put in place a relief system to ensure maximum aid goes to the needy. You might ask why professors at BUET and not BRAC or Red Cresent Society? The answer is simply reduced overhead costs. All donations will be collected online through Paypal. To find out more about the flood relief drive visit their website.
The following are two other links related to the relief drive:
Link: Point of Contact at BUET
Link: More about the efforts on Bangladesherdak