San Francisco just told data center builders to slow down.
The city's board of supervisors voted unanimously to impose a 45-day moratorium on new data centers, with the option to extend the freeze to 22 months. The pause blocks a planned expansion in the Bayview neighborhood and a 49.5 MW project in Dogpatch. Both sit inside the same city that houses a large share of the AI industry's biggest names.
That timing is the interesting part. Europe already hit its own data center pause, triggered by grid capacity limits rather than politics, and now struggles to build the computing capacity the European Commission says it wants. San Francisco's moratorium creates a mirror-image problem: a city with the political appetite to halt construction, located at the center of the AI buildout that depends on it.
Two different causes, same outcome: data centers delayed, on two continents, for reasons that have nothing to do with each other.