Well according to the CDC thats not true
Results and Conclusions—During 2006–2010, about 2,000 U.S. residents died each year from weather-related causes of death. About 31% of these deaths were attributed to exposure to excessive natural heat, heat stroke, sun stroke, or all; 63% were attributed to exposure to excessive natural cold, hypothermia, or both; and the remaining 6% were attributed to floods, storms, or lightning
https://www.cdc.gov/nchs/data/nhsr/nhsr076.pdf