(CNN) As the nation grapples with the horrifying school shooting in South Florida, there are ways to help.

You can donate to funds for the victims and the families.



For those in the Florida area, you can also help by donating blood.

OneBlood has sent additional units of blood to the Broward County hospitals treating the injured, and are asking for help to replenish the supply.

They are now appealing for donations of the universal blood type O-negative at donation centers over the next few days. Appointments are recommended and can be made here

There has been an amazing outpouring of support from donors following the tragedy at #MarjoryStonemanDouglasHigh. See what happens behind-the-scenes at the blood center as the OneBlood team processes thousands of donations to help patients in need. https://t.co/4bf6azJKVk pic.twitter.com/aYu146NHse — OneBlood (@my1blood) February 19, 2018