9.4.1. Heat Waves

Global climate change is likely to be accompanied by an increase in the frequency and intensity of heat waves, as well as warmer summers and milder winters

9.4.2. Decreased Mortality Resulting from Milder Winters

In many temperate countries, there is clear seasonal variation in mortality (Sakamoto-Momiyama, 1977; Khaw, 1995; Laake and Sverre, 1996); death rates during the winter season are 10-25% higher than those in the summer. Several studies indicate that decreases in winter mortality may be greater than increases in summer mortality under climate change (Langford and Bentham, 1995; Martens, 1997; Guest et al., 1999). One study estimates a decrease in annual cold-related deaths of 20,000 in the UK by the 2050s (a reduction of 25%)

http://observatory.ph/resources/IPCC/TAR/wg2/353.htm

13.1.4.1.2. Mild winters (Europe)



Milder winters exert a major impact on the natural environment. Overwintering of species is more successful. However, failure to kill off pests and diseases that prey on wildlife, as well as failure to cull weaker members of the species—which then compete for food in the following springs and summers—in the end may be counterproductive. Cannell and Pitcairn (1993) show that during two mild winters in the UK,



http://observatory.ph/resources/IPCC/TAR/wg2/494.htm#131412