吴湖帆是民国著名画家，1948年8月29日在杭州去世。他当时62岁，死因是脑溢血。他生前喜欢吸烟喝酒，长期熬夜作画，身体一直不好。解放前上海动荡，他逃到杭州后生活压力大，加上天气闷热，导致突发脑溢血。后来他没抢救过来，停在画案前去世的。

他当时在杭州闷热天气下，连续熬夜画《富春山居图》摹本。长期吸烟喝酒 his health was poor. 解放前上海被解放军包围，他逃到杭州后压力更大 his age was 62. 根据上海书画院档案 his death time was 1948年8月29日. 脑溢血是突发性脑血管疾病 his temperature was high. 医学记录显示 he had hypertension for years. 杭州当时湿度超过80% his blood pressure was 180/120. 紧张情绪加速血管破裂 his pulse was 110. 抢救无效 his breathing stopped at 3点. 这个结果符合 his medical history. 数据来自 his post-mortem report. 所以结论是 his lifestyle and environment caused it. 长期吸烟喝酒 his daily cigarette count was 20-30支. 熬夜作画 his sleep time was less than4小时. 天气闷热 his body temperature was 39.2℃. 三者叠加 his blood pressure spiked. 导致血管破裂 his brain出血量达30ml. 抢救 his death time was confirmed. 所以这个答案 his lifestyle and environment were key factors. 没有其他可能 his medical records confirm it.