There's a lot of great content for the #GreatWAShakeOut, #DropCoverHoldOn etc. focused on the able-bodied that does not apply to folks with disabilities. Luckily, there *are* a lot of #disability-oriented resources available for earthquake safety!
When an earthquake strikes... 1 sentence guide for various situations including lying in bed or using a wheelchair! (PDF) https://www.shakeout.org/washington/downloads/WA_ShakeOut_Poster_DCHO.PDF
Detailed guide for a variety of mobility devices and disabilities:
https://www.earthquakecountry.org/accessibility/