Noun
Any affection produced by the action of the sun on some part of the body; especially, a sudden prostration of the physical powers, with symptoms resembling those of apoplexy, occasioned by exposure to excessive heat, and often terminating fatally; coup de soleil.
Source: Webster's dictionaryHeat exhaustion, sunstroke, endemic diseases such as malaria and typhoid would match the destructive effectiveness of the Moscow winter on the invading armies of Napoleon. Source: Internet
On reaching Chile, Masefield suffered from sunstroke and was hospitalised. Source: Internet