What are our options if my apartment and the ones around it have water, electrical and structural damage that isn't being repaired?

In California, after reasonable notice to the landlord, you can spend up to one month's rent for needed repairs. You can also report the landlord to the local health department, but that may not result in any repairs. There is a presumption for 6 months that any attempt at eviction is in retaliation. First get all the tenants together or have representatives speak to the landlord that you do not want to cause any trouble, just get the rental value you are paying.