Keeping the Pumpkin Plants Warm in the Snow

Last night it rained and the rain turned to snow this morning.  It has snowed pretty much since 8:30 this morning with the temperature hovering around 34 degrees for most of the day.  The pumpkin plants are safe in their hoop houses right now where it is 53 degrees currently inside.  Not ideal growing weather by any means, but warm enough to keep the plants from freezing.  In one hoop house I have a 250 watt heat lamp.  In the other hoop house I have a thermostatically controlled space heater.  Last night and just now I covered the hoop houses with silver tarps which will help hold the heat in a little.  As long as the electricity stays turned on we should be good, but I'm looking forward to Tuesday when we return to spring like weather.