Flood is excluded and tenants are rarely told
Every renters policy sold in Arizona excludes flood, meaning water that arrives across the ground from outside. Homeowners hear about flood cover because lenders require it in mapped zones. Tenants have no lender, so nobody raises it, and in a city with washes and monsoon runoff that silence is expensive.
A tenant can buy contents-only flood cover
Flood policies are available to renters for personal property alone, without insuring any building, and they are inexpensive. Very few tenants know the option exists, which is the main reason it is not taken up.
There is a waiting period
Flood cover typically does not take effect for a number of days after purchase, so it cannot be arranged when a storm is forecast. It is a decision to make in a quiet month.