Query: cold kills many more people than heat.

Relevant passages:
2015 Indian heat wave <=SEP=> In May 2015 , India was struck by a severe heat wave . , it has caused the deaths of at least 2,500 people in multiple regions . The heat wave occurred during the Indian dry season , which typically lasts from March to July with peak temperatures in April and May . Although it typically remains hot until late October , Indian monsoons often provide some respite from the heat .   The South Indian states of Andhra Pradesh and the neighbouring Telangana , where more than 1,735 and 585 people died respectively , were the areas most affected by the heat wave . Other casualties were from the eastern states of West Bengal and Odisha . The high demand for electricity to power air conditioning led to power outages in some cities . The 2015 heat wave has had the highest recorded temperatures since 1995 . In May 2016 , a new record was set in Phalodi .

Urban heat island <=SEP=> An urban heat island ( UHI ) is an urban area or metropolitan area that is significantly warmer than its surrounding rural areas due to human activities . The temperature difference usually is larger at night than during the day , and is most apparent when winds are weak . UHI is most noticeable during the summer and winter . The main cause of the urban heat island effect is from the modification of land surfaces . Waste heat generated by energy usage is a secondary contributor . As a population center grows , it tends to expand its area and increase its average temperature . The less-used term heat island refers to any area , populated or not , which is consistently hotter than the surrounding area .   Monthly rainfall is greater downwind of cities , partially due to the UHI . Increases in heat within urban centers increases the length of growing seasons , and decreases the occurrence of weak tornadoes . The UHI decreases air quality by increasing the production of pollutants such as ozone , and decreases water quality as warmer waters flow into area streams and put stress on their ecosystems .   Not all cities have a distinct urban heat island . Mitigation of the urban heat island effect can be accomplished through the use of green roofs and the use of lighter-colored surfaces in urban areas , which reflect more sunlight and absorb less heat .   There are concerns raised about possible contribution from urban heat islands to global warming . Research on China and India indicates that urban heat island effect contributes to climate warming by about 30 % . On the other hand , one 1999 comparison between urban and rural areas proposed that the urban heat island effects have little influence on global mean temperature trends . Many studies reveal increases in the severity of the effect with the progress of climate change .

Captain Cold <=SEP=> Captain Cold ( Leonard Snart ) is a fictional character appearing in American comic books published by DC Comics . Captain Cold is the leader of the Rogues , a loose criminal association , , as well as the older brother of Golden Glider . He also has served as a bitter enemy to the Silver Age Flash Barry Allen , both enemy and grudging friend to the third Flash Wally West , and one of the killers of the fourth Flash Bart Allen .   IGN 's list of the Top 100 Comic Book Villains Of All Time List ranked Captain Cold as # 27 . Actor Wentworth Miller has portrayed the character in The CW 's live action Arrowverse .

Cold wave <=SEP=> A cold wave ( known in some regions as a cold snap ) is a weather phenomenon that is distinguished by a cooling of the air . Specifically , as used by the U.S. National Weather Service , a cold wave is a rapid fall in temperature within a 24-hour period requiring substantially increased protection to agriculture , industry , commerce , and social activities . The precise criterion for a cold wave is determined by the rate at which the temperature falls , and the minimum to which it falls . This minimum temperature is dependent on the geographical region and time of year .   In the United States , a cold spell is defined as the national average high temperature dropping below 20 F.