The United States now hosts 15 of the world's 20 largest hyperscale datacentre markets, with Northern Virginia alone accounting for nearly 12 percent of global capacity, according to Synergy Research. American dominance has grown over the past year as cloud providers continue to expand infrastructure, driven by the concentration of major operators' headquarters in the country and the enormous scale of new campus developments, though the rise also intensifies concerns over power demand and local community pushback near major sites.

Since last year, Tokyo, Sydney and South Carolina have dropped out of the top 20, replaced by Indiana, Tennessee and China's Guangdong province, leaving only five non-US markets, four of them in Asia-Pacific and just one, Dublin, in Europe. Synergy attributes US dominance to 62 percent of hyperscale operators being headquartered there and the country generating almost half of global cloud revenue in key segments; Amazon, Microsoft and Google alone hold 57 percent of worldwide hyperscale capacity. While Northern Virginia's Loudoun County hosts around 250 datacentres and expects $1.3 billion in equipment taxes next year, growth is shifting inland, with Texas capacity up 71 percent over the past year against 36 percent worldwide, and Synergy tracking a further 915 facilities in planning or development.