SIGNAL No.14 — California's data centers are quietly redrawing the state's water map
California is about to cross 300 operating data centers, and the national-average story is hiding where the water for compute actually comes from — two-thirds of new hyperscale campuses built since 2022 sit in high-water-stress counties. Today's signal sits across three movements: AI's reflexive turn, where Anthropic releases a 'dreaming' research preview that lets agents review prior sessions between runs and Gartner predicts more than 40% of agentic AI projects will be cancelled by 2027 over governance gaps; Where compute lives, where Salt Lake Tribune warns Utah's 920 MW of data centers plus 2,600 MW under construction could form a heat island over the Great Salt Lake and a Virginia Tech study quantifies the cooling power-vs-water trade-off; and The living forest, slowly read, where PNAS shows warming thins soil microbial diversity and weakens carbon storage, an ARMN essay revisits the mycorrhizal 'wood-wide web' that routes roughly one-third of annual fossil CO₂ emissions belowground, the Klamath River's post-removal Chinook return hits 180% of forecast at 39,860 fish, and an RSC review across 116 tree species finds spring leaf-out advancing 2.5–5.1 days per degree of warming.
Today's Signals
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01 — AI is becoming reflexive while its own governance still lags
- MarketingProfs carries Anthropic's release, as a research preview, of a technique called "dreaming" — an interval between live sessions where an autonomous agent reviews what it did, tries to learn from it, and carries that learning forward, treating "between sessions" as its own engineering surface; the unit of an AI worker starts looking less like a conversation and more like a colleague who came back with something they thought about overnight
- Accelirate reports Gartner's forecast that more than 40% of agentic AI projects will be cancelled by 2027 — 78% of organisations are deploying or piloting agentic systems, yet 63% cannot enforce purpose limitations on the agents already out and 60% cannot quickly terminate one that is misbehaving, so the agents are out but the kill switch is not, and the two halves of this story sit in direct tension with each other
02 — Data centers are being placed where water and power openly compete
- Salt Lake Tribune reports that Utah hosts 48 operational data centers drawing about 920 MW with another 2,600 MW under construction, and that the heat coming off this build-out could form an urban-scale heat island over the desert — pushing a Great Salt Lake already down roughly three-quarters in volume toward an evaporation regime that exposes an arsenic-laden lakebed to the wind
- Inside Climate News puts California's tally at 286 operating data centers about to cross 300, with U.S. sites consuming roughly 17 billion gallons of water a year — only about 0.3% of the public supply on average, but two-thirds of new hyperscale campuses built since 2022 sit in counties classified as high water stress, so the question of who the water is for is being argued now in county hearings, not in distant policy papers
- Virginia Tech News puts the Utah and California stories on one graph — evaporative cooling cuts electricity demand by trading it for water, while air-side cooling does the reverse, so there is no free lunch and the resource trade-off is being moved between two scarce inputs rather than eliminated; where you put compute becomes a coupled equation of water, power and climate rather than three independent questions
03 — The living forest is being read at the scale of microbes and seasons
- PNAS publishes evidence that rising global temperatures reduce soil microbial alpha diversity through thermal filtering and competitive exclusion, and that the thinner community sequesters less soil organic carbon — closing a positive feedback loop underground where warming weakens the workforce that decides whether soil keeps its carbon or returns it to the atmosphere
- ARMN summarises a converging body of work estimating that roughly one-third of annual fossil-fuel CO₂ emissions are routed each year into mycorrhizal fungal networks — the "wood-wide web" is no longer a curiosity but an active participant in the carbon books, and restoration ecology now has to count fungus as well as tree
- Daily Kos tallies 39,860 fall-run Chinook salmon back in the Klamath main stem and tributaries two years after the largest U.S. dam removal — about 180% of the forecast, with the first naturally hatched Chinook documented in Upper Klamath Lake in more than a century; the cautious western line on dam removal is being rewritten in real time
- RSC — Environmental Science: Advances carries a systematic review of 145 studies across 116 tree species finding that temperature is the dominant driver of spring leaf-out and flowering in temperate and boreal forests, advancing by 2.5 to 5.1 days for every one degree Celsius of warming — a pollinator on day-length and a bloom on temperature drifting apart by a week starts to misfire the pollination work that runs the forest
Sources
- 01Anthropic introduces 'dreaming' — an agent self-review research preview— MarketingProfs
- 02Gartner — more than 40% of agentic AI projects to be cancelled by 2027— Accelirate
- 03Utah's data centers could create a heat island over the Great Salt Lake— Salt Lake Tribune
- 04California's 300+ data centers — where does the water come from— Inside Climate News
- 05Virginia Tech quantifies the power-vs-water trade-off in data center cooling— Virginia Tech News
- 06PNAS — warming reduces soil microbial diversity and weakens carbon sequestration— PNAS
- 07Mycorrhizal networks — the 'wood-wide web' in the forest carbon books— ARMN
- 08Klamath River — 39,860 Chinook salmon return at 180% of forecast two years after dam removal— Daily Kos
- 09Tree phenology — spring leaf-out advancing 2.5–5.1 days per degree of warming— RSC — Environmental Science: Advances