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The ongoing record-breaking heat wave in the West will continue while expanding across the Central U.S. through the weekend. Based on preliminary data, there have been around 50 March high temperature records broken since March 17 and more than 150 daily high temperature records broken. Record setting temperatures are...

40,345 Aufrufe • vor 4 Monaten •via X (Twitter)

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Satya Nadella: Microsoft’s latest Wisconsin AI data center keeps yearly water consumption no higher than that of 1 local restaurant. "The cooling loop is filled once and the data centre can operate effectively with zero water consumption. Daily water usage across a year is roughly equivalent to what a single restaurant would use" The mechanism is mainly about replacing evaporative cooling with closed-loop direct-to-chip liquid cooling, so water moves like coolant inside a sealed machine rather than being boiled off into the air. Hot GB200-class AI racks produce too much heat for normal air cooling, so cold liquid is pushed through pipes into the servers and across metal cold plates touching the hottest chips. The liquid enters the rack cool, absorbs heat from the chips through cold plates, then exits the rack at a higher temperature and carries that heat through pipes to a huge cooling system outside the compute floor. Microsoft says Fairwater sends that hot water to cooling “fins” beside the datacenter, where 172 20-foot fans blow air across the fins and dump the heat into the outside air. The important detail is that the air cools the water through metal surfaces, so the water does not need to evaporate the way many older datacenters use cooling towers. The cooled liquid then returns to the servers, repeats the loop, and keeps absorbing heat from the chips. In older data centers, heat is often removed partly through cooling towers. Hot water meets moving air, some water evaporates, and that phase change carries heat away. Effective, but it consumes fresh water continuously. But Firwater is a closed loop because the same coolant keeps circulating through sealed pipes: it absorbs heat from the chips, releases that heat through radiator-like fins, then flows back to the chips again. For Wisconsin Fairwater, Microsoft says more than 90% of the facility uses closed-loop liquid cooling, while the remaining portion uses outside air and switches to water only on the hottest days. ---- From "Microsoft" YouTube channel, (link in comment)

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A large tank at an aerospace factory in Garden Grove started leaking. The chemical inside - methyl methacrylate, or MMA - is a clear liquid used to make airplane canopies and strong glues for aircraft parts. When air got in through the leak, the chemical began to harden and turn solid…just like superglue or epoxy does when you leave the tube open. This hardening process creates a lot of heat. With thousands of gallons reacting at once, the heat keeps building and speeds up the reaction even more. This “runaway” effect has raised the tank’s temperature, damaged the tank walls, and is releasing toxic fumes. Timeline • May 21, 2026 (Thursday, ~3:40 p.m.): The 34,000-gallon tank at the GKN Aerospace facility in Garden Grove develops a leak. Air reaches the roughly 7,000 gallons of MMA inside, starting an exothermic curing reaction. Orange County Fire Authority responders arrive on scene on Western Avenue. • May 21–22, 2026: Heat from the reaction builds quickly. The temperature of the material rises from normal room temperature to about 90 °F. Toxic vapors begin venting from the tank and internal pressure starts to increase. • May 22–24, 2026: Evacuation orders are issued and expanded for safety. Approximately 40,000 residents in Garden Grove and nearby areas are told to leave. GKN Aerospace chemists and local hazmat teams monitor the tank around the clock and work on cooling and containment steps. • As of May 25, 2026: The tank is still unstable. The runaway chemical reaction continues, and emergency crews remain on site performing damage-control operations. The liquid MMA itself is highly toxic. If the tank fails completely, thousands of gallons could spill into storm drains and waterways, causing serious long-term environmental damage. At the same time, the ongoing heat and gas buildup raise the danger of a sudden pressure-related rupture or explosion that could send a large cloud of toxic vapors over this heavily populated part of Southern California. The situation has not been brought under control.

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Wednesday, April 3, 2024, 5:42 PM PDT: All systems are a go for a cold and unseasonable Gulf of Alaskan April storm. Strong thunderstorms have already developed near Redding, California, and a series of embedded impulses are rotating around the main low axis off the coast of Humboldt County this afternoon. This storm system will undergo a brief 12 to 24-hour intensification process before hitting San Francisco, Santa Rosa, and Sacramento late Thursday afternoon. It will bring isolated strong to severe thunderstorm conditions. A large surface cold front will develop late Friday morning as the low axis trajectory slides down the coast towards Pismo Beach, California by Friday at dawn. Severe Weather Risk In Central And Southern California on Friday. The atmospheric conditions will become increasingly unstable, giving way to thunderstorms from central California to San Diego. The cold pool of air aloft, at minus 28 Celsius above 25,000FT, will create volatile weather conditions with the possibility of pea-sized hail and brief heavy rainfall in some areas. The air mass will be very cold, supporting a dusting of snow near the Grapevine and Cajon Pass. Temperatures will drop into the 40s and 50s, and the 30s near the mountains by Friday midday. As snow levels have been trending downward and hit rock bottom, there may be some isolated areas at 2,000-foot elevation along the San Gabriel’s and parts of the San Bernardino mountains that could see a dusting of snow. Even some dusting of snow in the high desert cannot be ruled out. There is a high confidence of elevated water spouts developing from San Luis Obispo to San Diego coastal zones, especially since one of the embedded disturbances will arrive on Friday from 11 AM to 7 PM. This is also the best opportunity for ample early April sun angle, which will give way to stronger convection across our region. I'm closely monitoring this developing situation in the next 24 hours. #Californiastorms #ElNiño #April2024

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