The evidence strongly supports the truthfulness of the statement. Multiple high-authority sources from the U.S. Energy Information Administration (EIA), the primary government authority on the subject, point to the availability of the specific daily spot price data required to validate the claim. The EIA's weekly update confirms significant price increases. Furthermore, a highly relevant financial data provider, Trading Economics, directly corroborates the claim by mentioning a "recent, massive multi-day price surge" in US natural gas. There is no conflicting evidence among the relevant sources. The sources concerning egg markets and EU natural gas were correctly identified as irrelevant and do not impact the assessment. Although the provided summaries do not contain the raw data to calculate the exact percentages, the collective weight of the evidence—from top-tier government sources confirming the availability of verification data to a financial source describing the event in similar terms—makes the statement highly probable.