* Fed's Powell: lowering inflation will be painful but necessary
* Inflation at risk of settling at higher levels
* ECB preparing for Sept, July rate hikes
* BoE's Bailey: bigger policy action not off the table
By Balazs Koranyi
SINTRA, Portugal, June 29 (Reuters) - Bringing down high inflation around the world will be painful and could even crash growth but must be done quickly to prevent rapid price growth from becoming entrenched, the world's top central bank chiefs said on Wednesday.
Inflation is breaking multi-decade highs around the world as soaring energy prices, post-pandemic supply chain bottlenecks and in some cases red-hot labour markets are pushing up the cost of everything, and threatening to set off a hard-to-break wage-price spiral.
"The process is highly likely to involve some pain but the worst pain would be from failing to address this high inflation and allowing it to become persistent," U.S. Federal Reserve Chair Jerome Powell said at the European Central Bank's annual conference in Sintra, Portugal.
Echoing Powell's words, ECB President Christine Lagarde said the low inflation of the pre-pandemic era would not return and that the ECB, which has persistently underestimated price growth, had to act now because price growth was likely to remain above the 2% target for years to come.
Engineering policy tightening to avoid a recession in the United States is certainly possible, Powell said, adding that the pathway was narrow and there were no guarantees of success.
"Is there a risk that we would go too far? Certainly there's a risk, but I wouldn’t agree that it's the biggest risk to the economy," he said. "The bigger mistake to make, let's put it that way, would be to fail to restore price stability."
Augustin Carstens, the General Manager at the Bank for International Settlements, an umbrella group of central banks, said policymakers had taken the first step in recognising they had a problem. Now their job was to tighten policy, as risks were mounting.
"They should try to... prevent the full transition from a low inflation environment to a high inflation environment where this high inflation gets entrenched," Carstens told the ECB gathering. "You need to prevent this vicious cycle from kicking in."
The ECB has already flagged rate hikes in both July and September while the Fed increased rates by 0.75 percentage points in June and may opt for a similar move in July.
The Bank of England raised rates by 25 basis points to 1.25% this month - its fifth successive move - and said it would act "more forcefully" in the future if it saw a greater persistence of inflation.
"There will be circumstances in which we will have to do more," BoE Governor Andrew Bailey told the conference. "We're not there yet in terms of the next meeting. We're still a month away, but that's on the table."
"But you shouldn't assume it's the only thing on the table," he said, referring to another 25 basis point hike.
However, Bailey also warned that the British economy was now clearly at a turning point and starting to slow. (Additonal reporting by William Schomberg, Ann Saphir, Howard Schneider and Linsday Dunsmuis Editing by Gareth Jones)