The day of heat waves and heat wave effects on CHD mortality in hot season (May–September) in Beijing during 2000–2011: percentage increase of CHD mortality on heat wave days compared with non-heat wave days; heat wave was defined by daily mean temperature ≥ 97.5<sup>th</sup> percentile with duration ≥ 2 days.
<p>The day of heat waves and heat wave effects on CHD mortality in hot season (May–September) in Beijing during 2000–2011: percentage increase of CHD mortality on heat wave days compared with non-heat wave days; heat wave was defined by daily mean temperature ≥ 97.5<sup>th</sup> percentile with duration ≥ 2 days.</p