Mapped outputs of the temperature suitability model for P. falciparum. (A) Modelled limits of temperature suitability for transmission of P. falciparum. Areas shaded grey are those in which the annual temperature regime would be unable to support infectious vectors at any point during an average year. (B) The number of days in an average year in which the annual temperature regime could support potentially infectious vectors. (C) The normalized Z(T) index of temperature suitability that incorporates not just the duration but also the degree of suitability across an average year. See text for a full explanation of all three metrics.