This article is written in British English, which has its own spelling conventions (colour, travelled, centre, realise, defence), and some terms used in it are different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus.
The baymen's legacy: a portrait of Belize City (Foster 1987, p. 59: "Although at least one hurricane had previously hit the 'Settlement' — in 1787 — the extraordinarily casual response to the hurricane warning of the morning of September 10th, 1931 was due to the belief amongst City residents that the barrier reef would take the sting out of any approaching tidal wave, and it was this casualness which was responsible for the high death toll of the hurricane")
"The 1931 Belize hurricane was the deadliest hurricane in the history of Belize, killing 2,500 people." - this could be stronger and more attention grabbing. In September 1931, a hurricane struck Belize and killed an estimated 2,500 people, the deadliest on record in the country. Only, Belize wasn't a country until 1982, so I'm not sure about the best wording.
Go with my wording (which I changed slightly), if that's OK. I found another source backing it up -  - even if that might not be the most reliable to cite. ♫ Hurricanehink (talk) 18:39, 15 November 2016 (UTC)
"by which time it began to rapidly intensify. The tropical cyclone quickly attained Category 4 hurricane intensity." - could you merge these?