Several hospitals are reporting blood shortages and seeking donations in the wake of the storm. O negative and O positive donations are particularly helpful, but people of all blood types are encouraged to donate. If you donate on Friday in Austin, you can get there for free using Fasten, a ride-hailing start-up company.

• Carter BloodCare is sending donations to Southeast Texas; see where you can donate here. You can also give blood through the South Texas Blood & Tissue Center - find out more on their website or by calling 210-731-5590 - and through We Are Blood.
• Driscoll Children's Hospital in Corpus Christi - which never lost power - is accepting blood donations as well as financial support.
• Living outside of Texas? You can still donate blood through the Red Cross.