When US industry veteran Katie Mehnert went to sleep last Sunday night in Houston, Texas, as rain fell from then-Tropical Storm Harvey, she thought her area would make it through the storm OK.

The alumnus of supermajors BP and Shell, now the chief executive of the start-up for women in the industry, Pink Petro, had seen water come up as far as the street but not near her home in the city's Energy Corridor area.