The short version on Storm Debris Cleanup: it is a whole area competing for the same trucks in the same days after a weather event. city often collect vegetation free after a declared event, so it should not fill a paid container. That's the line worth reading twice before you settle on a delivery window.
The number stenciled on the side of the container is a volume, not a weight limit, and the weight limit is the one that actually gets enforced. When homeowners after severe weather call in this kind of job, the debris volume is usually easy to anticipate in advance, so the containers that get dispatched tend to land in the 20 or 30 or 40 yard bracket. Know your timeline and know your restrictions. Those two facts get you a straight answer instead of a guess.
With the scope not yet fixed, what ends up in the container is hard to know ahead of time, so treat the first size as a starting estimate rather than a final order. Nail down what counts as a prohibited item on this particular order. The list varies by hauler, and a mattress or freezer left on top can stall the whole pickup. A container that's half-empty and a container that's overflowing are the same failure: the wrong size was ordered. Give the real numbers and avoid either one.