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If you want official numbers on how 2018 ranks in the annals of recent record-breaking temperatures, you’ll have to wait.

One result of the government shutdown, now in its fourth week, is that NASA and the National Oceanic and Atmospheric Administration are unable to issue their annual temperature analysis. And, because that data is so widely used , neither can some other governments.

For example, Britain’s national weather and climate monitoring service, the Met Office, publishes its own global temperature estimates that incorporate NOAA data but use a slightly different analytical method. That’s important because when many different analyses show the same trend — in this case, rising global temperatures — it helps give researchers confidence that their work is sound. But, the NOAA data that the Met Office needs is currently offline.

“Usually, we would have received it by now,” said John Kennedy, a scientist at the Met Office Hadley Centre, which specializes in climate research. “But this month, we haven’t.”