fever heat

the heat of fever; body heat exceeding 98.6°F (37°C).

feverish excitement.

Origin of fever heat

First recorded in 1830–40

During seven days the town was kept at fever-heat, each day its intensity becoming heightened.

Recollections of Old Liverpool |A Nonagenarian
They are curiously alike in the shortness of their lives, and the fever-heat of their production.

Giorgione |Herbert Cook
It was then and at this sight that the intense half-suppressed excitement reached its height of fever-heat.

Men of Iron |Howard Pyle
Whereupon the temperature fell to below normal from fever-heat.

The History of Sir Richard Calmady |Lucas Malet

The boys took to the idea at once, and the excitement very soon was at fever-heat.

In the School-Room |John S. Hart